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7/29/2019 6.11.86 nagheze mantegh.pdf
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8_?@DL(_+1 =.&'(_k*
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_; C (A(BC))(B(AC))9w C* A((AB)B)
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stm_Ym2lb Dis A(BC) (AB)C
z#{&RQ EM A~A2k)A|Y5 DNE ~~AA2k)Al DNI A~~A
)A^ Con (AB)(~B~A)|Y5)A^ Con (~A~B)( BA)
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CM2 A~(A~A)
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3E^"+m K A(BA)(^"+m K ~A(AB)
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&_ (A B ) =\ ( ~ A B ) QR 0/1(A B ) =\ ( A B ) ( B A ) QR+
(A B ) =\ ( A B ) ( B A ) 'QR+
T =\p p ogd/ F =\p p o]Y"/
t =\p ( p p) ,"rgd/ ]Y"+gdS1f =\ ~ p ( p p) ,"r]Y"/ W =\p ( p p)
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/b*/bB( A
W )=
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( A B )*/k( B I )A=\( A B )*/b+( B I )( A W )=\( A B )
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2#jD)*(ft#}-0p!(!$>A , ~ A B]jH0)*(/00DTA , ~ A B , ~ Bpj#@*DFA B , ~ A B j}-p!(!$t#}-0fA'(0=GA B ~ B
.&'()A,-)AI)A$*,r,-8*_f(L$7"&'(#)AB9=8_?#+r-;stL_Y-H_=8_
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_;&'(d=:=)A}-}-,")Af?d5$_=K=)*($,r)A+`_}-L_'"}1A~A=
1. EFQ: Ex Falso Quodlibet2. Equivalence of Contractins3. Disjunctive Syllogism4 EQT: Ex Quodlibet True5. De Morgan Negation6. Boolean Negation
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P
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H_*&'(c+""c'(*D@+'")AD,-&*nd!5+R-f$8_Rc'}H_*&'(,!Z
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f"5-9RD-f$+1/4D+8_f+$_/40ft9/4D/D`3;
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$=!"#$%&'()*$!+
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A A = B BA'(3+1
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i(l_A ~ A+B ~ B__}!j=M
A ~ A B ~ B
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2#jD)*(ft#}-0p!(!$OA , ~ A BA A B
]jH0)*(/00D>XA , ~ A B , ~ BA A = B B
pj*#@>>+A B , ~ A B ( A B ) A B
j}-p!(!$t#}-0fA'(0=>TA B ~ AA B B+
2#jD,rH/!/4L_!R/40/4_fD$]j/4/0(!0+90Dpj/4L_H/!!R+/4/4,rS/!;/4_fD+/4f
+$
j/40?RD,rH/!/4L_S/!;$
!"#$%
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Zq`d8_x_}CK(Zf;8_"08_"-/4!_(m?dU("2lk=
^_#D;+8_U+U:Cq8!Z$f^mD0$4!8_"EFQ#)A5_+?/6,_ZDo+(("9r8!_Ym};=
D^_#EFQD+Z"$+r_f,0D^_#`a!$ZR1
1. A ~ A A2. A 2Q|Y5ij3. ~ A 2Q|Y5ij4. A B ?dliCj5. B #@*i:+Kj
9. EFQ: Ex Falso Quodlibet10. Equivalence of Contractins11. Disjunctive Syllogism12 EQT: Ex Quodlibet True
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?dliCj5. B #@*i:+Kj
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W+m (f8_,-RD"l=d(8_D#A$8_0&'((stf3Est"|#+#A3"L.=
st}3Est!5(+,$Lo"0/HA0"QQRstf,~i}!$stjstD@+'stD'stD
``stDd;0+r,8t$},r(+L_;0=8_D_f$d(H_+r1
R?@":O5E
d(`+1UNV
/09w
limjy3A
A AA ((A B) B)(A B) ((B C) (A C))(A (A B)) (A B)
IC*BW
d(+1oUN
/0_;
limjy3A
A A(A (B C)) (B (A C))(A B) ((C A) (C B))(A (A B)) (A B)
ICBW
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K
d($1(+,$UC
f9;+xZ9w
limjl_fZ
A ((A A) A)((A A) B) B(A B) ((B C) (A C))(A (B C)) ((A B) (A C))
DC**BS
d(D++`+8!td(}!$st.&'(Dt_qf+Wf(!0(=id|#+(UC}!$stp(}!$st%kA
$ +r=jf!d( 8_ $f 9;+ ?d |Y5 " $DDA ((A A) A)'qD,rfD9;+EDxZ9w`-+H$C**D((A A) B) BqH("|Y5}DTH$=3E^"+m,+}i_*
2lbjfL_0d(0DR_&'(9R$=
KR:O??@":2Q|Y5(A B)A
(A B)BE
2Q2lbl[(AB) (AC)][A (BC)]Im*AdjunctionA , BA BAd
l?dA(A B)B(A B)
I
?d2lb|Y5[(AC) (BC)][(A B)C]E
stm2lb_YmDistribution
(A (B C))((A B) C)
Dis
",(o/QRf?A!D.&'(@+'stDH(R=8_3$
k*0"$D9(";+L$7"&'(!5+.&'(2Q0?d+R!R=D8(/0.&'('st"H(stf;,
q+$2Q(f@st+r@/"$@st,+r-;=2Q$?dD,-8*&3Q";+,8_D8(/0
"2_l2_l8_H_!Z)*+H!0&'(3Est"4rf ,_Ym=?dDL$7"&'(H!R?d|Y5+2Ql*01
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KC
li*j2QA ( B (AB))I|Y5i*j?d(AC) [ (BC)((A B)C)]E
?d2lk?#^"+m"$8_?d|Y5+2Ql0('0K(4=
stmSb?d+'`dm*,+}?#$8_@`d_Ym1r3{ _f (!3{?* Sb?d + *8_ D' `d _L/"(f9
^"+m?d(_0K&'("$Rk5=)*+,?251GOP$,$%B
p!(!$ D$( D.&'(D_9(DRl3Qp!(!$W+"4rf,/#L3$9(.&'(l3QH_+r1
stm_Ym
A (B C)(A B) (A C)
S A
S A B
S B A
S A
S B
S A B
S , A B
S - {A} A B
l
A (B C)
(A B) (A C)
S A B
S , A C
S , B C
S , S - {A , B} C
S A B
S AS B
S A B
S A
S , S B
|
Y5
(+,$UPN+r,/#+L3$f3"DfD](Qf}0m"Z9r"vH("=
.&'(+L$7"&'(l3Qp!(!$*H9+$!$1(_`+y/4D2Ql/4D?d|Y5(_+R,__0
y0C(R,__$++AA+B*(_$+stmR+}__Ymi =stmQ+*+fL_*8!RD_YmstmQ
_"D`+*8_ma|Q(l_D?d2Q**+,r8!R+("stm*/0,$R9(Dd$_Ym=
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K:
8_(l(lD?d+2Q*"$8_H_}_"_!+(l_Dp!(!$,f(l(l$D=D4(_
|7ZD!9'QR(lDZ"$'p!(!$(lDp!(!$
!9ZRf\+QR(l"L$7"p!(!$=f0D+8_(l;+?d+2QL$7"0=
SR*1'9T
f_,r,+}"_03$.&'(0fR`$0f+R`a!$$80+0"+R&ifusionj$=D]b/D&"D=+$\/;,+-f$(lD8_
/RR2lk'"+=oDH"$&lW+9;+.&'(1=u_d2_li"
$dD&D,rjC=_l(!2i$D&D,r"j:=?dL_QR+Sbi$2_lD3#n"jK=QRSb?d+i2_lD3#n"
=ji0td,-
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KK
H0(;*D.&'("$8_D8_?#-0+$3{?*0f(0Z`lDQR+Sb?d+2_lDR**8_=
$Sb?dL_fs,D$W+1
`d&b1
A ( B ( A B ) ) &l [( A ( B C ) ) ( ( A B ) C ) ] &|Y5
$D+W+W+8_L_o/$3&l?d,
$aQR+$=3RD&l?d"$8_D_*0
l3Qp!(!$q&l=2_l Sb?d+8_,`l3{(";_f,0Da(!1
Sb?d2_lf,01_f`";,rf
( A B ) ( A B )
k*$;k*Da2_l(D_H$1A ( B ( A B ) )
k*8_D-$D("{a2_l$o}!$1
( ( A B ) C ) ( A ( B C ) )
,02_lSb?df1
1 A ( B ( A B ) ) Sb?d2 ( B ( A B ) ) [ ( ( A B ) C ) ( B C ) ] Sb?dB
3 A [ ( ( A B ) C ) ( B C ) ] QRli+Cj
4 ( ( A B ) C ) ( A ( B C ) ) A_4;i:j
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KN
)*(fH("2_lu_dQ&H0t-^8*+
)A2k)A+H!0=H_Dd8_1
1 A ( B ( A B ) ) k*2 A ( ~ ( A B ) ~ B ) )A^3 ~ ( A B ) ( A ~ B ) A_4;C4 ~ ( A ~ B ) ~ ~ ( A B ) )A^:5 ~ ( A ~ B ) ( A B ) 2k)AK
6 ( A ~ B ) ( A ~ B ) k*7 A ( ( A ~ B ) ~ B ) A_4;8 A ( B ~ ( A ~ B ) ) )A^P9 ( A B ) ~ ( A ~ B ) &2_l
10 ( A B ) ~ ( A ~ B ) N+U
D,("H("&fu_d_lH1 ( A B ) =\ ~ ( A ~ B )
8m2_lf_f$u6dD2_l8_4!H0_f$?"+R+
8m2_l$("3{=7"_f`,k*;Z!3{$Rr1
( ~ ( A ~ B ) C ) ( A ( B C ) )/(!2_l";,rf2_l(l2_lf0-rD("8/kR
$fa&(lt,(/QDau_d=
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K
3E5Z&1
A B B A _4;
A ( B C ) ( A B ) C "R_YmA ( A A ) h3A B A ( A B ) h3( A B ) [( A C ) ( B C )] s_}( A B ) [( A C ) ( A ( B C ) )] &l
URT*5'+
f__,r,+}"_03$.&'(0`fR0R$$f+`a!-"+$80+0L_&_ifissionj
$=i(l$`l8__+Z\_*Z\DZ\(Z\D/A=jD\/;/D&_"D"/
&'(fZ"$+8_fD&_\/;D_;,D\/;+]b0
D"?d+2Q0?dD.&'(D&_+$=i
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KP
(!2_lD8_l!3$(H_=?R"D,ru_d2_lD+8_f$(+$!"D3E.&'(H("1
( A + B ) =\ ( ~ A B )
3E5Z&_1A + B B + A _4;A + ( B + C ) ( A + B ) + C "R_Ym( A + A ) A y3AA + ( A + B ) A + B y3A( A B ) [( A + C ) ( B + C )] s_}( A C ) [( B C ) ( ( A + B ) C )] &_|Y5
[ A ( B + C ) ] [ ( A B ) + C ][ ( D A ) ( B + C ) ] { D [ ( A B ) + C ] }
`d8_,3_,/0&_3E_k*/0!,0D+8_f+H_
/D9r/_/Rf+=
VR/%?@":
lSb?d(_};L$7"&'("$,/0"$*+`dH_(QRL_+'QRL__1
1 x A A ( a/x ) |Y5
2 x ( A B ) ( A x B ) 8_h+"A*xRfr l
3 x ( A B ) ( A x B ) 8_h+"A*xRfr _6
A ( a / x )
x A
H/l*
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K
stm8*,+}?#,/0$Sb?d,+}?#'( `d _Ym}-&0$'1,r3{_f3{?*Sb?d8_DH/l*+`+?d+L/"
^"+m(f9rL/"?d(_0K&'("$Rk5=?d03R
stm^$Sb,_f2Q?d_YmH_1
x ( A Bx ) ( A x Bx )( A B1 ) ( A B2 ) A (B1 B2 )( A B ) ( A C ) A ( B C )
istm^"(";stm?d`lD2Q?d_Ym$?d2Q_Ym=jDH_"+,f-$Sb?dH!_f(Rrd
H_(1
3 x ( A B ) ( A x B ) 8_h+"A*xRfr l
"DQR$_f2_lfDR_r1A B =\ ~ A B
$Sb?dfd8_?d,r++03RD,Z+0=
;+$"$,)*+"2_l1x Fx =\ ~ x ~ Fx
"4rfH_oDH(";,r(stf.&'(3EstH0Z`d
bH(""v-;;+$1
1 A ( a/x ) x A l
2 x ( A B ) ( x A B ) 8_h+"B*xRfr |Y5
3 ( A x B ) x ( A B ) 8_h+"A*xRfr _6
stm?d$?d03R,_f?d2Q_YmH_1
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KU
( A x Bx ) x ( A Bx )( A ( B1 B2 ) )( ( A B1 ) ( A B2 ) )( A ( B C ) )( ( A B) ( A C ) )
}4(_,$Sb?d,_f(Rrd,r++03R" ,+?d01
3 x ( A B ) ( x A B ) 8_h+"B*xRfr
WRX/%?@":
}-0$"v&/+bD#$8_D]Y"+gd0$fa=8_D_H0Z",(o0}-0$,+D,dD(
(b`dD9r+"""v$=$"Db_qfD`d8_,}-0$fD9r9_$=
}- 0$Zqf}+3&'(+$+3&'(ft&'(_0_D8_"(D,=,R+,+D4(_D+3&'(z53
0$8_*+`d,D+3&'(2#t(Zf+H_fmf"H0Z!$,r#$8_d#'"o("q|dst8_,Z=
(_};L$7"&'("$,/0"$*+`dlSb?dH_(QRL_+'QRL__1
1 p A A ( B/p ) |Y5
2 p ( A B ) ( A p B ) 8_h+"A*pRfr l
3 p ( A B ) ( A p B )
8_h+"A
*p
Rfr l
3 p ( A B ) ( A p B ) 8_h+"A*pRfr _6
A ( q / p )
p A
H/l*
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NV
$"$Sb?dd+f_"(";=D8(/0A+B`+p+q?dD8_(+!D`+Sb`B!;p$!=;-BfD
!$!d`+?d+H_"p A A ( q/p )lb&'(H!R$/]Y;,(o"r/=
;+$_2_l"$R1
p A(p) =\ ~ p ~ A(p)
_f`d_\b+,r-1
1 A (B/p ) p A l
2 p ( A B ) ( p A B ) 8_h+"B*pRfr |Y5
3 p ( A B ) ( p A B ) 8_h+"B*pRfr 3 ( A p B ) p ( A B ) 8_h+"A*pfrR _6
-_+f_}-0$&'(R0D&'(8_"$8_D?d,
;+$D&&_+"2_lD)*f,++&'(3Est1
A B =\ p{ [A (B p)] p }
A + B =\ p{ (A p) [ (B p) p ] }
p A(p) =\ q [p (A(p) q) q ]
A B =\ p{ [(A p) (B p)] p }
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N
Y/5Z97?[:\A?@":
S0/D]Y"+gd",_f`d,1
A T A ( t A )
F A ~ A ( A f ) ,
",(oH(DD_(l]Y"f/+$)*(fD3Est
R!RSb?dD.&'(=i9R&'(3Est|7Z8_DJ+Dst"$Z(=j
D*@]Y"(__!F!R&l.&'((st_(o0DDR]!"f3EstD.&'(0R=$8_#8_?#
"FQ58_$+ D_5(st+ 5D3Est-;DR=f0(o0D_H0Z",(oD_f`D/
$3{?*.&'((st9(D)A1
( A F ) ( ( A F ) F )5/5Z97?\A[:ism9R&'(_(RrDst8_$!-y=#$z53D;+8_
4(_9R&'(ub+cRfD8_(!$st8_q|dH("j=DL$7"&'(L/"]Y"+gd0p ~ p+p ~ pH_"2_l=8_
2_l_"D.&'(0=H_R?$!_R_D8_(="H__D73*?d+2Q+&_+&0/}-0$,"2_l=0$
}-D,]Y"+gdS}"2_l=DL$7"&'(KDi&'(3Est+
9RJ+jD"2_l_fd)*+]Y",1F = \ p p
~ A = \ A F
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56/237
NC
i$9R&'()*5/0D2_l+8__r=DD2_l+8_D.&'(+L$7"&'(3EstK++R++L$7"&'(D)*_f_"D
+z#{&RQ?d+2k)A|Y5(9Rn5D.&'(
2_l/DR_0"3{`d8_,=_D8_(2_lm_0HRj=
2_l}D.&'(H__f01
F = \ p p t = \ p ( p p )
T = \ p p f = \ s { p { r [ [ p [q (((q p) p) q ) r ] ] r ] s } s }
m2_lH9fD2_lf,$0"!$;+$+&1
f = \ s { p { r [ [ p [q (((q p) p) q ) r ] ] r ] s } s }
f = \ p { r [ [ p [q (((q p) p) q ) r ] ] r ] }
f = \ p { p [q (((q p) p) q ) ] }
~ A = \ A f
+Z2_l(+,$UUCxVDD,0,+"!RfD+r"$2_l?*,r3EstD.&'((sto=2_l8_Dq
R+$$(+,$-f=,!D4(_8_"H0D2_l+QR+L_59(,^$+(R`3*?*(+8_"H0
/-\*+`3*2_lL_5(=+2k)A|Y5(D)A9Rn+'8*8!RCMD
CM (~AA) A _f`",,1
p { p [q (((q p) p) q ) ] }
RD`_f0H0$,1 p { p ~ P }
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N:
~ p { p P }~ t
,01
1. p { p [q (((q p) p) q ) ] } y2. p { p [ ((~ p p) p) ~ p ) ] } |Y5
3. (~ p p) p 9Rn?dCM
4. ((~ p p) p) { [ ((~ p p) p) ~ p ) ] ~ p} ?dC*
5. [ ((~ p p) p) ~ p ) ] ~ p A\b+:+K
6. p [ ((~ p p) p) ~ p ) ] ( p ~ p ) s_}N
7. p { p [ ((~ p p) p) ~ p ) ] } p ( p ~ p ) $stm
8. p { p ~ P } A\b+C+P
9. ~ p { p P }10. ~ t
11. p { p [q (((q p) p) q ) ] } ~ t
12. q [ ( t ( t q ) ) q ] k*R+
13. q [ ( ~ ( t q ) ~ t ) q ] ,SCi9Rnj
14. q [ ( ( q ~ t ) ~ t ) q ] _l&2:
15. ~ t ~ t q [ ( ( q ~ t ) ~ t ) q ]A ( ~ t ~ t A ) fKk*L/"
16. ~ t p { p q [ ( ( q p ) p ) q ] } l#
17. ~ t p { p q [ ( ( q p ) p ) q ] } +
q"$QR+(o0_f0
f p { p [q (((q p) p) q ) ] }~ A ( A f )
.&'(R
*/9rf+8__f"!$3Est2_l,(, H0(!3{?*.&'(3Estf'(3Est(_?#D.&R+D2lbD9R&'(3EstfJ+/DR_2_l++$D(J+5/0
(0$.&'()*=,!D8_3{2_l"H0R_f`l9R&'(DF$1k*_f'n`"4rf$9R&'(1
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NK
K p ( ( q p ) p )
H_1
f p { p [q (((q p) p) q ) ] } k*
f p { p [q (p q ) ] } lK
f p { p (p q q ) } $|Y5
f p { q q } AA\b+
f q q $_f
f F 2_lF
)*2_lDd8_1~ A = \ A f
_fd_r1~ A = \ A F
9R&'()*2_l8_"HD2k)A|Y5,*D~ ~ A AD
Dz#{&RQ,*A ~ A+~ A ~ ~ AD/4!0=D.&'(3Est^ma2_lf,*8_D#+&_Q/4!R=
f(+,$2_lD8_;+$$D)*+]Y"0
!$8_R9r!Rf8!$"3$($m=$7"(o0D$m8_&/?6(Z_RD$R3,/(0Z!9=8_$$!
H0,0D?6f("qR!-2_l=$|Y5*DL_D,08_'$"C'$;+$l*DL_+K$!"=D+0
(}-L_i~ p'$C+~ t'$f:j}-$!8_}_;R$=8_,}-0$"0}-?R9(D/3E0}-/0+RfHD0
(+3ED-=R_2_l;0$"$l3Q8_(fD
(3Est !*+}-9(DH!0&'+3E0/0(!D4!)*5(04!=
2_l#8/0Fp p$gd=2_l8_F/0'"}-0=!*+H_-}-/00}-"D0("}-/0DH0
}-/0_3E$m"$ub+(+3EfHD0R++R$+!=f
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NN
5"80vf+`/!58_D+8_FR+!&'(+8_=8__D*}-/02'"$,+tl*+`/!50/02'f!5
}-3E0=,0("_f01
`+,0i_f1j
1 F p p 2_lF
2 F ( ~ F F ) |Y5
3 ( A F ) [ A ( ~ F F ) ] BC
4 ( A F ) [~ F ( A F ) ] C:
5 ( A F ) [~ ( A F ) F ] )A^K
6 ~ ( A F ) [( A F ) F ] CN7 ~ ~ ( A F ) [( A F ) F ] }!$
8 ( A F ) [( A F ) F ] ,P+,01
1 F p p 2_lF
2 F ( T F ) |Y5
3 T ( F F ) CC
4 T [( A F ) ( A F ) ] B:5 T [ A (( A F ) F ) ] C*K
6 T A (( A F ) F ) 2_l
7 ~ ( T A ) (( A F ) F ) }!$
8 ( A ~ T ) [( A F ) F ] +2_l
9 ( A F ) [( A F ) F ] +2_lF
DR3{`R+/_fR3{R+ftJ++$J+/8_,`lD`8_D9R&'()*2_l(_f"3{`~ A ~ ~ A
9R&'(k*"$=",(o0'$D_,0DH(P+*+|Y5+}!$9Rn"2k)A+D'$+8/0},0+
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N
&}!$+?d}!$9Rn*~i9R&'(2Q}!$j"$=
!$"+)A#"$Dcb+D_,0H_,0
qD}-?R9("$"$(}-0D$|Y5+$3E0$$D/08_,`lD,08_Zr'$"";_T~ FH
D!R(m}-S/00$D&_Q8_f$H/l0=
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61/237
NP
S]1/'31$7%)03R.&'(L!/$++0&'(L!/$(o0L!/$D9;+0
&'(9R&'(L!/$+^_#"}!$0=.&'(L!/$3",,rm0R""AL!/$$8_f$+r-;L_0=D+8_f
"0q8_!/$H00.&'(L!/$H9R= D!,9; !/$ H0 f _-,9; D8/ 0D8/ n 0
lb+lb+D8/0,9;D8/n0lb++0+`n+`0===L!/$^$+H(".&'(cRH0=08_!#(+_-
903\*++_-+$/+6"_- $!39r$=-$08_,_-D_Sf_0"w(!=9l-0f]!"fst8_D`50+_-
_-}0DdD_qL_f!$+$,r,3*=
31$7%]1/'
"5?74
=`/41/4`/4$`(of=
`0D`/4L_!30L_}!D/(R!RH0(+(R!R!0!D(R_L_)AD(R_====D8_($,
-_+8_"HAS`/4D01
^5
C=_q1-SRA'(qL__qT_mS"$#/4&'(p!(!$*3SR!=
3(3_mZf#/0_D_qL_D_q"-R__Y
_Y},rf#/0=qL_D_-!9Z`Ze_!/0D_=
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N
d31T_q&'(_mS$`0A"SfTR4!kT
RD
(l_-T S ArDA S=
-T/4A'(q+R0(!S2_lAf0(!/4D?oad2_lRR=?5_f2_l?8_Da/l(("1
T S AT/4_ff0(!T"R!R;+TS A=
`E012#1_q#EDA'(q0_k*/4$&'(,r_m=_q8_
_q/0!*+_q8_!o"&'(_m"$_0L$7"R!Z$=]1`/0/4$_q_`ED0=}_q8_+_q8_
_q/0S/!;$0=$8/n+-f$DRrD_q8_=_qL_"H(R-f$_-f$=_q-f$3{D?#8/0H9f_0_0"8_
_q9"$*,fm=
p1D2_l8_$D9/4_q&'(_fL$7"&'(_m4!_k*/0D9/4DL$7"(R,rk__k*/0D8_(+0
kD9/4"#5=
q!2Q|Y5+l*"4rf_qL_D$*A'(0q8_(!3$_qk`+'"D0-;Q`+0
kR_q1
( A B) T A T + B T
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NU
H0q!?dl*"4rfD8(o_qL_D$*A'(0q8_(!3Q`+f_-$_qk`+@"D0
R_qk-;1
( A B) T r A T -( A B) T r B T -
3"Q_+1( A B) T r B T _ A T -
9rf"0?d|Y5*_f+bH5$8_fL_0^
/("3{=_qfZD8_;+H5^D0H_+$*$1
( A B) T A T _ B T
H58_$o/$@*(=`L_-0D*8_(f$f_DH"$DR_qL_k@$_q,rks_0=D@*
D#+0Hn_qf*0=L$7"&'(_k*/4D/
_f@*`/$_qL_"A ~A(_,+$,rkA_~AR,rk=_qZ@*_q(D0$*D9R&'((!30=
R{D9R&'("$A B$k*A_BRk*=",(oDHD&'(8_A ~Ak*=
(/0@*,fD,D#5+lb+$h31/4`,ffq6#L_gd0_qL_,i="8_D!3#8__m&'(
&'(fL_"_q$;08_D,("H0#+-*z6j=D,ffq6#0A B$gd_Dq6#,rA_RgdBD^m
A B_qk`/4,ffq6#L_gd0$A_B8_kR_q=q6#(D9;8_fD},f'A0$,f0=
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16Hodges, Wilfrid, 2001, Classical Logic II Higher-Order Logic, in Lou Goble (ed.), The BlackwellGuide to Philosophical Logic, Oxford: Blackwell, , p. 34.
17_(D/Mendelson, Elliott, 1964, Introduction to Mathematical Logic, London, Champan & Hall, forth edition,1997, p. 34.
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$,r"+u_@st8_|0+`D8mst=b8_ D6,R&*}lb9o",1
Rabcd(l_/0e_!a+b+cp(d$i_+d$gd=j
"(";RL/"lb9oR$dfL_0lb_f0,
"2_l1
Rabcd =\ x (Rabx & Rxcd )
Rabcd =\ x (Racx & Rxbd )
Rabcd =\ x (Rbcx & Rxad )
3D.&'(L!/$"4rfH0a0(!0`l+f$0,
dRabcd$$__f+"_=
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C
$$!$'_;(l8_$ub+Dlb9o+lb"$dZ$*_4;+Z0=9((l$-$dZ"
H(";_;=-$*_-1
Rgab (a=b)
g$&'( _k* /0 9( + /0 ?R (l_ $A'(!lb+=/0D+8_f}-dQR0A A,rk(!0=Rgabe_!/0(l_a+gp(b
/0"$(l8_8_+$A'(e_!ap(b$=-$*"_-8_`l(l8_8/0a+b$=,_!D*8_H9A'(4!+
A'(n4!H_R?*L1
AA'(4!B$Af&'(8*+*L/"9(BRr$AA'(n4!B$Af&'(n8*+*L/"BRr$
n + L_} Db_ 8* + * (l_ &'(n 8* + *=8*+*&'(n!- + 9 !5 + $ + Z 8* ?R
`ZfmRR0;+R+lR+b_,+D&'(-_=
D`EADA A+A BA'(e_!f/0A+(!0~ A ~ BA'(4!~ (A B)$"#5x~b_4!x~:C",(oD$x$p+f
b_4!xHA9oR+$x$8"$}-8_4!x$$+D$8f44!,$=
D6b8_$*f/,";-1-a = brRgabi;QR8_R-$,1Rgaaj=*/8_lb+L_A'(e_!/0_-
q!$8t$8_+$lb+,rZp($=
qD;+8_R$-$*+/"$1-Rgabra = b=qH_"$8_$*"$Rgaba b=-b?RaRbA'(
a4!0if$A'('"_f4!s_00j8_(+b/0?RA'(e_!aA'(e_!/0+Dap(b0Z=-D_$fb/0?R
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:
A'(e_!aZ?R_RaA'(e_!/0_fR}a,/0a$i(_fWZA'(e_!/0$D_q0+$_qDlb+0D2_lj=
/$,rW_Ym D$$-$*+/(_ 3$r0.&'(L!
/L!/$,R$d+$?/-_f"4/RL__-_r=A'(?_a,+-$*D+8_fH__Ym=
+/7R
Rxyz_fd+f_H0,H12#j!*+lb+Z9("(!0H901
x y x
z
z y
]j`!*+lb+gd0(!0H9}01
x y
z
xz
y
Rwxyz_fd+f_}H0,H1
2#jlb+Z9("!*+(!0H901w x y w
x z
z y
]j`!*+lb+gd0(!0H9}01w x y
z
wx zy
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`E1
,"H0P ( Q Q )3{?*3E.&'(=_f`D8_
(";1x
P1
Q1
P1
Q1
y
zP1
Q1
P1
Q1
v
wP1
Q0
D`8_x+yH0z4!+(0z+vH0wH_(l_Rxyz+Rzvw=0!D8(/0P+Q!-gdDlb+e(m0};H_Qw]Y"Wf"
,rH_="4rfQv+gdwH_+$]v"Rzvw4!D"H_-Q Q
z]v"$="4rfD8(/0Py+gdQ QzH_+$]v"Rxyz4!D
"H_-P
( Q
Q )z$]v"=/d1
xP1
Q1
P1
Q1
y
P ( Q Q )0
zP1
Q1
P1
Q1
v
Q Q0
wP1
Q0
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qSurvey$!-|+l=+b,r_k*(_0q8_"/9!/-D/+(!(o0rH_q"}!$A Ak*
D$(A A)k*=_"aUN""5Qq8_L!/$8#+
,9;R_}-"q_0A A(R3gd9r=8_D"Q,9;D0A+]v"A$gd,9;8_D8_(}-0D0!5+b
}-/0+&'(`d!5(!08/0)*(&'(_k*)A+0=,9;8_0A'(nL!/$D+8_f+gd9r&'(_k*Z"(l8_(!0
q^_#0iS1S3j`nL!/$,9;+A'(n0,9;`n0(=
gdhR+/$8_$_fdL!1
wA $` w w(Rww w A)wA $`n w w(Rww w A)
$31-w$`r
wA w(Rww w A)wA w(Rww w A)
-+w$`nrwAwA
(_"4r,9;D0A'(n_"L!/$8#+UN
&'(+Rl}D`$0f^mD.,,9;8_D_"0=
,9;l"H__+`9;+&'(lb+$!$'k5+0,9;0 `8!Z$3!lD`n9;+&'(A'(n(_0A ADA A+(A A)qkl$9;+0=L!/$8_^"+mf9;+00
/;fD.K+K*DA ( B A )+A ( B B )3!lDf$=/-&'(`+8_H_q"}!$0S1S3(!k*=
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P
H(","}!$gdhR_DZ`+3!,,1`A B&'(8_D(lD0(A B)D!/$qfD+8_f+$A Bx
$gd0y"DRxy-DAy$gdBy$gd=
D-$D,("HK+K*`'H("1L_"("yx+y"H_Rxy+Ax+gdy+]v"B+$gd+0y$A'(n9;=hR(
gd`D0B A+B Bx(!0]v"iB A$]v"8(o_f0"y"DRxy-DAy$gdBy+$gdB B$]v"
_f" 8(oy$ A'(j=` A D#5 8_ 0A ( B A )+A ( B B )x#(_,+$gd9rxRgd=L_H!D8_(
H0,,3!l+H`+8_)A`E=
&'(^"+mf(o0D^_#3!l.03!l_f$/R=/8_$/;8_f8;K*1
( A C ) ( B B )
,.B B+A C$Rr7"=^_#&'(`8_D`58_
+b` D9; - _f $ 3!lA C+`9;D,9;,rRgd_}-+0ZA'(B B0Zgd,r=
$$!$'/$lb^"+m8_`'.&'(L!R5Q0$=/"4rfDlb+$!$'+$lbL_"f5,
'/$$!$' Da/!5D$lb+ "DR0Zlb =hRgd$L!/$8_QRolbR_=DH!-9;+&'(",(oAx$gdA0y"DRxyRgdD=H0ZubD*8_"1
A Bx$gd0y+z"DRxyz-DAy$gdBzRgd=
(lH0t(_,+D4(_DH_flb$'8_"H0,H`0A ( B A )+A ( B B )3!lL!/$8_1L_"("yxD
y+z"H_Rxyz+Ax+DBy"0$gdDz(!gd=(
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gdhR`D0B A+B Bx(!0]v"i0"8(o_fy+z"DRxyz-DBx$gdAz0"8(o}+Rgdy+z"D
Rxyz- DBx$ gdBzR gdj=` A D#5 8_ 0
A ( B A )+A ( B B )x_,+$gd9r#(xRgd=H0,,3!l+H`+8_)A`EL_H!D8_(=
/D`5R!-8;K*$L!/$_fR0Z`'lb`E8/0R!-)AK*D?3*(("yH"HA C+BDD
x+y+(RgdBzR]v"=D,(",9;;+HH(";.&'(A'(n01"kA`E
`A ( B B )9_"H_RoDH_""v(l_A'(`8_B B
xH_]v"=.&'(L!/$(_04(_"!R!i9;+&'(+`nj,9;/0DD_};D08_A'(,9;L_;+(RA'(n(
,9;_$H0,,r &'(_k*gdH!$faL!/$D/0D0(((RA'(n_A'=,9;(_;D.&'(L!/$D+8_f0
(_0/,rD_}-A'(,9;L_D(("8l/DA'(n0_g"i=qZ/4D.&'(0,9;fD_}-A'(0/,rP
"=D_,!$("S;U/;:N=j
61$7%
$d%
.&'(L!/$R!Z$DiFramej$L__(S,g,R)3#n,r"$F,(0=!Z$};fL_0ub,("H_fm1
S
1@?74L&/Sl* _lb+l f$3isituation, set-upj"n_8/(
(R,9;};_,9;+D8/=lb+/43#n0K,#+(0,r/H$(0/0SH_=
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U
g+,_`6L5;+DL!/$8_,9;L_?*+,,rA'(_k*,!$fa
"3{=3#n,9;8_g(=iL!/$,9;(o0,rf_DA'(0
t#+_}-,gj="$ub+gY#+$lb+L_}gS=R@%+6LR'lb+,p!(!$'"$lb$,00=lb+0x+
y+z'R-9(+-x+y}!DH0Dz(R=
$d%)5E Raaa l = Rabc Rbac ,A C= Rabcd Racbd ,AC :=
,A+C;\b_4Zrn0R(!0=
cBN/
!Z$!Z$L_!*+DL!/$`DR/3l0,rRf+R($0/R=Wf\L_(fD?#8/0Wf*l+0!0Y-
`H!00=Wf*\/0"(!00/gd._R,/0\*+Y-Wf0(("8l`0Wf(='_R8(oL_`L_Wf!3#
Wf/0`L_Wf_+(o/0_9(08_+-q0+3!D&_Q/8l`3!=
BNc/51e$/Wf\_ D!0Dlb+0D0!0i_9(+j+gdWf+f
3]Y"_lb+L_`0+$Rf+!/$L!/$Y#+0]v"_$gd=
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UV
Wf\0V,Wf+f_lb+0!0"(0{1,0}($0=D_3Vlb+/4+0!/4Wf/400
=d,f1
V: Var S ValV: Var(iables) S(ituations) Val(ues)V: {P, Q, } {a, b, c, } {1,0}.
-lb+gd0!/4xWf0V/V(x)rH0,
"D_fhRhR$f|0ZDR1Rgxy V(x) V(y)
Z
\/0!Z$L_$`_#Wf0!0=d,f1
Model = (Frame , Valuation)M = (F , V) = (S, g, R, V)
8_`,!"Wf#"0Wf\_D"00!0
- 8l 0/ gd ._R " W!- 6=Wf ._R 8_ 0* Wf}0,r7_v+(H_fm=
BN?2"5//Wf*gd._R_0T+F('nlb+0/++
lb+L$7"&'("(!0d,/001
wV(T,w)=1 wV(F,w)=0 V(AB,w)=1 V(A,w)=1 V(B,w)=1V(AB,w)=1 V(A,w)=1 V(B,w)=1
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U
Wf*0t+fA'(,9;(fgWf*+$'0/0(D+'Rf1
Vt V(t,w)=1 w = gVf V(f,w)=0 w = g*V V(AB,w)=1 xy(Rxyw V(A,x)=1 V(B,y)=1)V+ V(A+B,w)=1 xy [ Rxy*w* ( V(A,x*)=1 V(B,y)=1) ]V+ V(AB,w)=1 xy{Rwxy [V(A,x*)1 V(B,y)=1]}Vg V(AB,g)=1 x [V(A,x)=1 V(B,x)=1]V V(AB,w)=1 xy{Rwxy [V(A,x)=1 V(B,y)=1]}V V(AB,w)=1 xy{Rwxy [V(A,x)=1 V(B,y)=1] [V(B,x) V(A,y)]=1]}
gdhR_3+hz53$h"$r!$/D
$3E.&'(L!/$"4(_R"vH("=8_gdhR,9(,03R++00,rRgdh++rH_=fCVVCx
$+r_fhRD&1
V+ V(A+B,w)=1 xy [ Rxyw ( V(A,x)=1 V(B,y)=1) ]
8,/-8_DgdhR8_,?*D3E.&'(L!/$D&_"f$6"#5,?*D3E.&'(_/_$mf:i`lC:CVVj"c7d_fd&_gdhR1
Wow! I hadn't realized that I made that mistake. The condition should be
a|=A+B iff (b)(c)(b*|=A or c|=B).
$*D!3#"=
+_8/0D}D&_R,,9(,rgdhR+03R++0gdhR,r0t+rH_=
qWf._R"$0t+f("_fd_R$L!/$1
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UC
Vt V(t,w)=1 xy {Rwxy pVariables [V(p,x)=1 V(p,y)=1]}Vf V(f,w)=1 xy (Rxyw pVariables [V(p,x)=1 V(p,y*)=1] )
"$8_8_?#hR!*+xy {Rwxy pVariables [V(p,x)=1 V(p,y)=1]}lb+wb_A!$R*",,
xy {Rwxy AFormulas [V(A,x)=1 V(A,y)=1]}
`Dd8_p ( p p )+tw(_,+0Zgdw+gR=
g*8!R/_$xZ#0`0Wf,,
3!+3!`&'("Q+xZ!Z$L_+xZ#L_0 .R`3!9_D?#8/0/8li&'(+!Z$D#jH(""v$(_l=H0`a!$3!D8(oi&'(+!Z$D#jf}
lH0+H_2_H98_,("H_fm=3!2_l!"v#H("=
ZG$?5M>`A$3!lAgRgd#,rf
`a!$AB
$3!lBA
g
Rgd#,rf (l_x[V(B,x)=1 V(A,x)=1]
`a!$A&
B1;;BnA
$3!lB1BnAgRgd#,rf(l_x[V(B1Bn,x)=1 V(A,x)=1]
0(l_x1D===Dxn+x[Rx1xnx V(B1,x1)=1 V(Bn,xn)=1] V(A,x)=1
`a!$A2'
B1,,BnA
3!l$B1BnA
g
(l_Rgd#,rfx{V(B1,x)=1 V(Bn,x)=1] V(A,x)=1}
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U:
!"2_l8_"$8_$/0}50gdBAg$#`llb$'*"R$1x[V(B,x)=1 V(A,x)=1]=H08_8!RDf3{
`a!$!/$08/,9;ffgR0Z=H0k*D8(oAB`a!$`l
BA$!3,r,0Y#+-0Z+8/,9;ffg-=H0,0"YfL!/$*"_0Vg(!0f_!Z$._R39r
f$xRgxx_f*$$01
1 V(AB,g)=1 y2 xy{Rgxy [V(A,x)=1 V(B,y)=1]} V
3 y{Rgxy [V(A,x)=1 V(B,y)=1]} |Y54 Rgxx [V(A,x)=1 V(B,x)=1] |Y5
5 Rgxx !Z$hR
6 [V(A,x)=1 V(B,x)=1] A\b+
7 x[V(A,x)=1 V(B,x)=1] l
^,0$$=
$d%G$?5*+,>
!Z$L_`a!$_`L_R$3!lR3!l,r0#/0=&'(`a!$_`L_R$3!lR3!l0#/0=
""H>
(A (A B)) (A B)
,013{`3!gD$"(A (A B)) (A B)H("3{1
1 V(A(AB),a)=1 y2 xy{Raxy [V(A,x)=1 V(AB,y)=1]} V3 xy{Raxy [V(A,x)=1
vw(Ryvw (V(A,v)=1 V(B,w)=1)]}V
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UK
4 xw{y(Raxy Ryxw) [V(A,x)=1 V(B,w)=1]} 0$&'(:5 xw{Raxxw [V(A,x)=1 V(B,w)=1]} 2_lRlb9oK6 Raxw y
7 Rxxx !Z$hRilj8 Raxw Rxxx +P9 Raxxw 2_lRlb9o10 Raxw Raxxw QRl11 xw{Raxw [V(A,x)=1 V(B,w)=1]} lN+V12 V(AB,a)=1
"H>( A ( B C )) ( A B C )
,r},r#$gdk*8_A"lb+0"H("{$"
^+$gdlb+1
1 V[ ( A ( B C )) , a ] = 1 A
2 xy{Raxy [V(A,x)=1 V(B C,y)=1]} 3!2_l
3 xy{Raxy [V(A,x)=1 vw(Ryvw (V(B,v)=1 V(C,w)=1)]} 3!2_lC
4 xy{Raxy vw [V(A,x)=1 (Ryvw (V(B,v)=1 V(C,w)=1)]} `/6&'(0:5 xyvw {Raxy [V(A,x)=1 (Ryvw (V(B,v)=1 V(C,w)=1)]} `/6&'(0K
6 xvw y {Raxy [V(A,x)=1 (Ryvw (V(B,v)=1 V(C,w)=1)]} `/6&'(0N
7 xvw{y(Raxy Ryvw) { [V(A,x)=1 V(B,v=1] V(C,w)=1)}} `/6&'(0
8 xvw{Raxvw { [V(A,x)=1 V(B,v)=1] V(C,w)=1)}} 2_lRlb9oP
9 V[ ( A B C ) , a ] = 1 A
10 xy{Raxy [V(A B,x)=1 V(C,y)=1]} 3!2_lU
11 xy{Raxy [vw(Rvwx V(A,v)=1 V(B,w)=1) V(C,y)=1]} 3!2_lV
12 xy{Raxy vw[(Rvwx V(A,v)=1 V(B,w)=1) V(C,y)=1]} (`/6&'0
13 xyvw {Raxy [(Rvwx V(A,v)=1 V(B,w)=1) V(C,y)=1]} `/6&'(0C
14 yvwx {Raxy [(Rvwx V(A,v)=1 V(B,w)=1) V(C,y)=1]} `/6&'(0:
15 yvw {x(Raxy Rvwx) [ V(A,v)=1 V(B,w)=1) V(C,y)=1]} `/6&'(0K
16 yvw {Ravwy [ V(A,v)=1 V(B,w)=1) V(C,y)=1]} 2_lRlb9oN
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UN
H0;0'$f+H0D0'$f+U$$r_r=
%"H> (A B) (A (A B))
,013{3!l"Dg`,3$(P Q) (P (P Q))H("3{
+gdg`a!$A,rlb+L_"H0,#L_$"8_3{+R]v",r#=
lb+9o"_q!Z$gDaDb+cHR!R+R!R1Rabc+P+Qc$+]v"lb+_(Rgd0=D,("P Qa$]v"iH__f
Rabc+Pb#+$gdQc$]v"j="4rfPa#+$gdP Qa8_($]v"P (P Q)g$]v"="$#58_P Qg
$gdib+0_f"!lP$gdQ$gd}jY#+P Q/P (P Q)04!=
H0f}!$+00_f$"D3{D.&'(L!/$Rf?5
7kl0$1
R(ab)cd R(ba)cd R(ac)bd R(ca)bd R(bc)ad R(cb)ad Ra(bc)d Rb(ac)d Ra(cb)d Rc(ab)d Rb(ca)d Rc(ba)d .
Rabc R(aa)bc, Rabc Rb(aa)c, Rabc R(bb)ac, Rabc Ra(bb)c,Rabc Ra(ab)c, Rabc R(ba)ac, Rabc Rb(ba)c, Rabc R(ab)bc,Rabc R(ab)ac, Rabc Ra(ba)c, Rabc R(ba)bc, Rabc Rb(ab)c,
Rabc R(ab)cc, Rabc R(ba)cc, Rabc Rc(ba)c, Rabc Rc(ab)c,Rabc Ra(bc)c, Rabc Rb(ac)c, Rabc R(cb)ac, Rabc R(ca)bc,Rabc R(bc)ac, Rabc R(ac)bc, Rabc Ra(cb)c, Rabc Rb(ca)c,
R(ab)cd R(ac)(bc)d, R(ab)cd R(ca)(cb)d, R(ab)cd R(cb)(ca)d,R(ab)cd R(ac)(cb)d, R(ab)cd R(ca)(bc)d, R(ab)cd R(cb)(ac)d,
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U
V2
*+,R
,*+)A^*(!0A'(H5L_f?R+)A^1
( A B ) ( ~ B ~ A ) )A^,*1
A B iff ~ B ~ A )A^*1
,r)A^gdDQR`0gdfD)A^,*($,
,r)A^,k*DQR`L_,k*f9(D)A^*()A^ 9( +$ _k* +6 D)A^ * D_ 3 $,
$k*D_k*=DgdL_)A^"$8/D*8_(D$3R3gd
H("+6_k*)A^?d-r2lbA'(fR,r"H$RH=
R= R+ + DN A ~ ~ A+ Cont
A B iff ~ B ~ A
&'(f2lb&'(/;fD.0B*+?d8/09(D)AD
=D?d+8_L/"8_D8/0+"3{,-8*,)*,-)*=)*8_0-2lb,-)*})*(
.&'(Rgd,r)A^?d"+("*,-)*R=
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UP
*+,R
?@":2O5EfCgKhi
_l2Q2_l?d2_lA
B =\ ~ ( A ~ B )
A B =\ ~ ( ~ A ~ B )
QRb`d_;
limj(A (B C)) (B (A C))(A B) ((C A) (C B))
CB
)*b`d
2k)Al2k)A|Y5
)A^-f$l
A ~ ~ A~ ~ A A(A B) (~ B ~ A)A ~ ( A ~ A )
DNIDNEContCI
;+(o|#+q1
q?d+2Qfn|#+q?d+2Q(_`+$.&'(0=DD|#+?d+2QD.&'(&+&_0/+(]b
D\/;++,D(0=D+8_f+2_l?*|#+qD,re_(l?d+2Q(_+
}-?d+2Qb`dH__H(""v-;=L|#+b`d(_$|#+Sb?d+"(l8__Ym
/QR/0?d3{D/(("3{QRd_k*/0_9((
A A$2k)A8*f!$(f=?d3{+0S+Wl?d(fD-f$CI$D=
?d(_9oCI-_-A4! Z)ARgd/0=}-"?dD8_($-f$+)*(!ZRZ)A}!CI}-_-"
$9_d8_+$-f$(l_-f$$gd=9o!f(_H4(m&(l,|#+}$_1}--A)A
-}B,8_04!"0A+B+_bL_0+-f$H03
Q_L_0k5"Q$,r\/4#l("=}--D+8_fA}-)AB$k+-f$(l8_04!=D^m2_lA B
~ ( A ~ B )-f$(lA+B$_L_3=(lD&D8_($-f$=
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U
$"D|#+}&_(l,+r$(_HR2k)A,*H("`/,r2_l1
A B =\ ~ ( ~ A ~ B )=\ ~ ~ ( ~ A ~ ~ B )
= ~ A B
D+8_f&(lm,1,/0'QR-+}#QRH_*&'(
DH_H9z63;,QRf7}&"-4!DH_*&'(Z\`@,/0|#+($H_*&'(=
2?@":fj,9%gkVist?3*0QRb`dD"L?d+2QDH_="4rf
`D|#+-f$l?d0S+W4!9rf+0DR4!f_)*`df?d8_$"S+W;*`d+H("8_}_
,(9(`dkAH(""v.&'((st1
Sb?d$2k)Al2k)A|Y5
)A^
A ~ ~ A~ ~ A A
(A B) (~ B ~ A)
DNIDNE
Cont
D8(/0H("!$_f?dLfD?d$;H1
Sb?dL_8?d(~ A ~ ~ ~ B) (B A)Bacon
?dLDL$7"&'()A^|Y5Cont_D( ~ A ~ B) (B A)D
_"L$7"&'((st".&'(D3E^"+m,A?#DL8_?d/4!2k)A,*W+f_DH_oD8_(08_D_f0
H(",3;A1
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UU
=BaconD(~ A ~ ~ ~ B) (B A)DD_9(D8?dD.&'(04!`d_$=
C=Bacon2D( ~ ~ ~ A ~ B) (B A)D?d+D_9(D8&'(
D.04!`d_$=:=Cont_D(~ A ~ B) (B A)D)A^|Y5DDNID2k)AlD
A ~ ~ A=K=Cont_D(~ A ~ B) (B A)D)A^|Y5DDNED2k)A|Y5D
~ ~ A A=N=ContLD(~ A B) (~ B A)D)A^oDDNID2k)AlD
A ~ ~ A=
=ContRD(A ~ B) (B ~ A)D)A^$DDNED)A|Y52kD~ ~A A=
P=Cont+D(A B) (~ B ~ A))A^lDDDNIDDNED+l|Y52k)ADA ~ ~ A+~ ~ A A=
Y51
)AS"2_l]Y"+gdS,1
A = \ A F~ A = \ A f
_fb`d_Dd8_F+fHR+}q1F A( ( A f ) f ) A
"4rfF A
D$* A
`lF A
$=^m A
(l]v"7" ,A#5$~ A(lv"],A$=)AS+8__k*fZ"_A_fH_1
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VV
2k)AlA AA ~ ~ ADNI2k)A|Y5 A A~ ~ A ADNE
)A^(A B) ( B A)(A B) (~ B ~ A)Cont
3E^"+m A ( A B ) A ( A B )Kz#{&RQA AA ~ Az#{&RQ2lb A A~ A ~ ~ A
`Z_f.Z$9r,3k*(0,D0=
=9RQR9R)*"__k*/0)*'QR=9Rn?dD8_+7 A A3{?*.&'(8_
)*8_D+8_f$,/)*9R=C=D2k)A|Y53!?# A A$8_D8_.&'(D
RH0ZD,r3!d"1A A_$gd_}-0(l_7"]v"=}-"4rf(D(!]v"7""H_v"0$m+,_D
`A A(!03!l2k)A|Y5+=:=?dD`58_ A Asmk*fD2_l(_f$3{?*!-
( A F ) ( ( A F ) F )$_r=
*+,CR
++_UP:!Z$A'(D!/$q57$D"z6+0$!t=&'(8_9rCRiClassical Relevant Logicj=CRst,/0
3ER+_k*)A^*+2k)A/0$EFQ=
CR = R+
+ DN A ~ ~ A+ RCont A B iff ~ B ~ A
+ EFQ A ~ A B
CR = R + EFQ A ~ A B
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V
3{$rD)A^*D,-8*"(";R=#8_H0 3{fd(0_ CR"+=d 8_(0_f
H_+r1
d++_(UP:xNP1
CR = R+ + DNE ~ ~ A A 2k)A|Y5+ Antilogism A B ~ C iff A C ~ B *b
H03{d+8_f*b$"D(d*+D`+(
+2k)Al+)A^EFQdH("3{+(1
*b,0d`+(1
A B ~ C
~ ~ C ~ ( A B )
C ~ ~ C
C ~ ( A B )
C ( ~ A ~ B )
A C A ( ~ A ~ B )
A C ( A ~ A ) ~ B A C ~ B ~ B
A C ~ B
,0EFQd+(1 ~ A ~ B ~ A
~ A A ~ ~ B
~ A A B
d2k)Al*,0+(1 A ~ A ~ A
A A ~ ~ A
A ~ ~ A
d)A^*,0+(1
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VC
A B
A ~ ~ B
T A ~ ~ B
T ~ B ~ A
~ B ~ A
d#$8_(1CR = R+ + EQT A B ~ B
+ EFQ A ~ A B
H03{d8_fd("Dd(+2kA,*$H("3{)A^*1
DN A ~ ~ ARCont A B iff ~ B ~ A
,01
1. ~ ~ A ~ ~ A2. ~ ~ A ~ A A EQT3. ~ ~ A ~ ~ A ( ~ A A ) +C4. ~ ~ A ( ~ ~ A ~ A ) A 2lbstm:5. ~ ~ A A A EFQK6. ~ ~ A A N
1. A A2. A ~ A ~ ~ A EQT3. A A ( ~ A ~ ~ A ) +C4. A ( A ~ A ) ~ ~ A 2lbstm:5. A ~ ~ A ~ ~ A EFQK6. A ~ ~ A N
A B iff ~ B ~ A
1. A B |2. ~ B ~ B
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V:
3. A ~ B B ~ B +C4. A ~ B ~ A EFQ:5. ~ A ~ A6. ~ A ( A ~ B ) ~ A K+N7. ~ B ~ B8. ~ B A ~ A EQT9. ~ B ~ B ( A ~ A ) P+10. ~ B ( ~ B A ) ~ A 2lbstmU11. ~ B ~ A ( A ~ B ) _4;V12. ~ B ~ A QRl+
d_+,+3;(118CR = R+ + A ( B C ~ C )
+ ~ ( A B ) ~ A B+ EFQ A ~ A B
d8_q4D($(!0_f`+?dA++?d_f=
*+,CR*
"!R!&'(CRD,r"$8_;+!R)AS+DHHR1)*b`d_CRb`d_+R=+_H58_
+UPK+"c'D8#+&*&'(Dc7'df$CR)AS+CR*=-)*R(Rr/)*+CR/rH0,
RH0Z1CR* =\ R
~ + CR
CR* =\R+ + DN A ~ ~ A
+ Cont (A B) (~ B ~ A)
+ DN A A
18 S. Giambrone and R. K. Meyer, 1989 Completeness and conservative extension results for someBoolean relevant logics, Studia Logica, vol. XLVIII
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VK
+ RCont A B iff B A
+ EFQ A A B
/Db`d8_$,-)*+/#)*(= "4rf/+8_D*++$*#+)A^?d*,-)*+2lb#)*!-}i =`!$CVVVxP+8_
D",-)*+,-)*=j/3$_)AS+8_fL_0k5"$8_"8_!RR
_s_}__k*"=&'(,-)*`d,+}D_3CR0#fCR"CR/k*?_33k*)*`d,+}+("#&'(
R
#0fR
"R
/k*?_33k*("="Dc7'dR
+CR
w!53"$L_0W!-D_3R+CRCR*w!5R!-$=,(o,-)*+#)*,;?#!8__D_H0Z0l"
=H("}_/!H0f L$7"(o$$(4(_=L$7"QR"H
DH_)AS+"4rf#Z+A)A,@"f$3HR!RL$7"QRS+_8_(=/0Dd8/0)*"_0
2_lHA,-+#H*+RR1 L$7"0#,-
QR A B=\A B~ A B=\A BQR+( A B ) ( B A )=\A = B( A B ) ( B A )=\A B
2' ( A B )=\A B~ ( A ~ B )=\A B?@ A B=\A B~ A B=\A Bgdp p=\p ( p p )=\Tp ( p p )=\W
]Y"p p=\p ( p p )=\Fp ( p ~ p )=\I
HA8/0(/*$*}'01
'0#,-
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VN
QR A + BA B~ A + BA BQR+( A B ) ( B A )=\A B( A B ) ( B A )=\A B
2' ( A B )=\A B~ ( A ~ B )=\A B
?@ A B
=
\A + B
~ A B
=
\A + B
gdp ( p p )=\Wp ( p p )=\t]Y"p ( p p )=\Ip ( p ~ p )=\f
RW+"D+8_f+$_.&'(#'H*
8_58!_0DL_f+$L_Sb0+m*=
3bCR=#L$7"QR+d*1
CR A B C
CR A ( B C )
,011. CR A B C
2. CR B A C ;
3. CR B A C ,C
4. CR B C A *b:
5. CR A ( B C ) ,SK
6. CR A ( B C ) ,N
7. CR A ( B C ) 2_l
C=#)*|Y5+l*1
CR ( A B ) C
CR ( A B ) C
CR A ( B C ) CR A ( B C )
,01?3**L/"=
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V
:=#)*|Y5*Af1
CR A B
CR T ( A B )
,01?3**L/"k*8_+1CR A ( T A )=
QRfz6/bQR/",_f5R"H0Z3{1
K=H0#QR+/bQRi_k*1jCR A B
CR A B
ZH5,CR*+r$/94!D,rfDH/l1
ZH51CR A B CR A BZH5H/l1CR* A B CR* A B
4!1-A+B#0/*+
r(R
CRA B
RA B
N=H0#QR+/bQRi`0j1
CR ( A B ) ( A B )
CR ( A B ) ( A B )
=-A#QR+#)**rR
CR* A
CR* ~ A
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VP
P=-ArR#QR+#)**
CR* ~ A
CR* A=-ArR#QR+#)**
CR* ~ A
CR* A
U=,-+#)*,L$7"}!$1
CR* A ~ A
CR* ~ A A
*+,KR
-EFQ*b_i/,/0R)*jZRid+RjH_}*qKRH$1
KR = R + EFQ A ~ A B
KR)A^?d,+}CR}+r$,1
KR = CR + Cont (A B) (~ B ~ A)
&'()*D)A^s_}8/0$KR*#)*=
,$$KR3"q"$8_R+CR`l)*/+DH("_A#)*5,-)*D_3+H_L_1
KR = R~ + CR + A ~ A
q8_!RY-s_/_f/0H_1
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V
R
_k*)A^
2k)A
^)A
EFQ
Sb?d
KR+ R
EFQ
^)A
KR K
CR
qD$ofD/8_+r*2lb0H_=q!;0
!R?d+H_*_02lbq_"_0*qR+} $,h'Z("(0H_=sm"H!-DHCRf3"CRH("}_/!,-)**+#+CR*
H(=_fda/Dd8__r1
R+ ~
R
,S,g )A^ #)A
~ A ARl
,S,g EFQ
)A,-
CR* KR
R+
CR
KRL$7"&'(f
K2lb$=,+}"$(l,8_
EFQ
R/0 ^"+m0/4!L$7"&'(0=^"+m$/;8_f0K+K=
`8_D_A02Q|Y5?d/0+rH_1
K = A ( B A ) K = A ( ~ A B )= A B A = A ~ A B
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VU
E = A B A EFQ = A ~ A B
,+}(_?#EFQR^"+m0K+K/4!*"$8_0
+dR$3!lfD+8_f+EFQK/$,="!R!KR|7Z"$8_;+CRD,rkA`d,+}
&'(Rw!5=,+}"$(l,8_EFQR3$9(Z"R``Z!5R?_3k*3k*73*")A0*0
Rk*3k*Dsmf")A/=`D/0_q_f1
KR1. [ ( ( A B ) C ) ( A ( A C )) ] C 2Q?R9(KR2. [ ( A ( A B ) ) C ] B ?d+2Q?RKR3. ( A B ) ( A A ) ?d+&?RKR4. A ( B C ) A B B 2Q+&?RKR5. A ( B C ) ( C ( A B ) ) B 2Q+&?R
`8_0)A/-0*+R_CRD!k*(KRk*=
`8_3{0KR
!D_`0_fR
3{R1R1. [ (( A (A ~ A) ) C ) ( A ( A C )) ] CR2. [ ( A ( A B ) ) { ( ( A ( A B ) ) ) ~ ( A ( A B ) ) } ] BR3. ( A ( A ~ A ) ) ( A A )R4. A ( B [ ( A B ) ~ ( A B ) ] ) ( A B B ) ( A ~ A )R5. A ( B { C [ ( A B ) ~ ( A B ) ] ) ( [ C ( A B) ] B ) ( A ~ A )
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V
r+EFQ`0R!-$=
9;,!-"$8_w!5nW!-8_!Rk5EFQ
!"_i$(=r=D^_#_mY-9;&'(_;/0+(+8}f_"_&'(8_$dl.,j`d("\*'n(
`0KR1KR5D)*0"D9;o",?#8/0&'("$#)*".&'(f,r2lbd9(_YmCR
`3*&'(+(("KR*7/,(0=
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W61$7%2+}RD3E.&'()*,$R3$!/$0=-
sm/?+H_q,rL$7"gd._RD)*_r1(__EFQ(l_
A ~ A B
3!l(l_)A^,*(__+R
( A B ) ( ~ B ~ A )
3!l-=?5R_?++H0)AL$7"gd._RH0t-$$_H(";+(l(_,r+_r)*+)AH_0
?_a+D!_,#t+,AD0+8_f""0`3*_$R=(!0_Z+d?_a8_fZ=8_dz53!
0+9rz53^$+H("H_fm=
61%MA[:m5Efi
)*L$7"gdhRb+L_`L_)A"$8_$gdlR]v"Dlb+,r`,r1
V ( ~ A , a ) = 1 V ( A , a ) = 0 V ( A , a ) 1
",(o]Y"(l)AD)*L$7"gdhRDH(gd+-=
D3E.&'(L!/$DgdhR8_,+}$R4!9!(R1j=,9;L!/$,R+6D8/0Cj=3!EFQ+EQT+:j=)A^3!=
1@2CR
.&'(8*+*L!/$8_D$!R/&3'__&'(+("R/+u6dDL!/$8_3"Z$=++_UP:D!Z$&'(8_
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C
,rCRiClassical Relevant Logicj9=CR3Est,/0R)A/0$+_k*)A^*+2kEFQ=
!R$8_,0D_fH_+r1
=,9; L!/$ ,R +68/ 01L!/$ 8_ DA ~ A/0 lb++gdD0A ~ Alb+/0-_f$]v"D0A ~ A
R]v"lb+L_A+~ A(l_8_+(0Z]v"Dlb+,rA$8/n8_+]v"H0$]v"H0=-D8(/0A ~ AL_
Rgdlb+A+~ A,r(l_8_+(0ZgdDlb+AH0$8/n8_+gdH0$gd="4rf`5A ~ A0
2_l(D$gdlb+lb+_DA_$gd,r~A(+4!D,9;2_l$,9;L_lb+0DL!/$8_"H_-=
(/0"4rfD8A+~A2_l ( D(! gd H0 !lb+0 8/4!D$8/,9;L_Dlb+0L!/$8_"H_-=
C=3!EFQCR1`A ~ A B" lb+ 0 _f $ 3!lA ~ ARgdB,o$gdA ~ A!lb+0gd=
!";+$L$7",fD.&'(L!/$,f"(";SbRgd=
:=3!EQTCR1`B A ~ A"lb+0_f$3!lB $ gdA ~ A/0 DH!- " ,(o DZ ` _f $ gd
lb+_0gdL!/$8=K=)A^3!CR13!( A B ) ( ~ B ~ A )
$""d8_H(""v,r)A`EL_A'(,9;+70
lb+$Da
Db
+c
"H_qRabc
`+0A
+B
lb+0a+b+]v"Dlb+c(RgdD=Dd8_A Ba $ gd~ B ~ AaD4! + $ ]v"(
A B ) ( ~ B ~ A )a$3!lD8_(+]v"=
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:
)A L!/$ 8_ )A ^ ,* (_ Hn /0 )A ^ DR`$3!l3!l00D_3lb+"QR0^Rgd
lb+},r)A0$gd=$_f*,01
N=`)A^3!3!l01`-A BA'(lb+0
"lb+0rRgdARgdB$gd}=*("lb+0D$*.&'(L!/$")A^L$7"B
R]v"A$]v"}="lb+0^m~ BRgd~ Agd}$=`D8_(~ B ~ AA'(lb+0$gd=
22KR
$8_)A^?d3!L_\b,_4;+,A"'0RH0H/l}Zr\b1
Rxyz Rxzy ,A:
)A ^ 3! Dd 8_ KRH$13! , , ( A B ) ( ~ B ~ A )- " H0 , $ "A BxR gd
~ B ~ A
x
0ZgdHR!R-_fRxyz
,A(:H_1Rxzy
+,oA Bx-^m$gdAzRgdBy-(l_0ZgdBy
R]v"Az-(l_8_+0Z]v"~ ByRgd~ Azgd0Z8_(+D~ B ~ Ax0ZgdR=D4!( A B ) ( ~ B ~ A )g
gd$3!lD8_(+=(o0DR8_,+0__$D_-$m)A^3!_
$mY-=,AhRD+7:R(l;-0*9( De_!D$!Z(
&'(3Est'(!_Ym"iw!5nW!-(l_j+,_m ?@NH_"R,r=hR$ ]'e_!,r f_!/$;D,(",A:,H("1
[ ( ( A B ) C ) ( A ( A C )) ] C
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K
"("yx`D0( A B ) C+A ( A C )_(!0gd
"H0,Cx$gd1-A BxRgdRxxx`+`gd/0
xgdRrDCx$0=-A BxL_oR3gdy+z0"Rxyz+Aygdi+Bz]v"j$=+`gd+8_fxD4!"H_-A Cz$gd=,A(0:H_Rzyx,oA Cz+AyD$gd4!"RCx$gd=,_m=
61%MA[:m5Efi
2*+,R
&'(,rfD.0";EFQ+$]v"/4!0)*(f,_D$l*"-q_0,rD0+)*(}-0#+R!R;R3gd=
l*8_}-Z03+]v"H0(*dH00H0(*d,RZH0D_,kA=l*8_+(!08/n_f;Z;+0,r,y00
"A8/=>OH0&'(D8(o/.0A0f,}-/0(+b0A~A+
AA-4!=*_D_3l"-q_0iL_gdHn,rAD0j}-fZ8_?d_8kAS?d(+b0/0
,rR3gd0=l*8(o}-Z_D_0_+]v"(Rgd0(Rgd,RZD_3,kA=TXl*8_stD\*+D0f*_0
19&'(fZl*8(onf8!$",9(m(/n0/4"f_0
`l*8_;)*(!00-q,=l*Dq$$+8/n0
,9;,9;9;+&'("-+(!0+l+0_fl*+n8/0+$8/0",9;+R.&'(+_0l*(""}8/n0=9""
,9;8/0/}_Ym(/4`f"0-f$0((",r8_}_;=20l*8_`E8_!90l*,+!$0=,!$8_D0f
/,};+R}-,,!$,rQ0]v"gd0=8_,l*}0/4`f_00(!?""-q=
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N
,9;,9;+(!00}0l*,0Dl*0"(l8_?"0$gd,r)A_}-=
d9olb+_l*L_D8_(i1j8/,9;iCj8/n,9;i:j
};+,9;f(/iKj,9;L_f(/n};i8/n=j8_$fa!+"YD;1
8_`+(o0"}-'H0Zl*0A'(n0il*(l_0?"n_8/nj/;+0H("$_S/!;H0Z!-8kAS
H_RpZ,A'(+7Af5f+H_=*7A'(n"H_(A'(R+A'(n,fL_D_3+H("l#'i)*(!,!$L_(j
H("W("A'(f=R*_D?#8/0k*(0,Z,f"H
0=8_+&'(".,DL$7"`+3&'(,f,/0};}oA'(,f8_
!,(o+$\_R7".&'(L!/$}!$f!$_H0Z"=8_$l*,,"0l*+8/n!/$W+*0
8_,+!/$,f"DR)*(o,f_"$Rl!0",r+!$W+0i*j$=W++Rf9o&'(f!$f(3D_0
lb+-f$9f!$0=
*L9$%
'+!$lb+,$,_0!/0+0=lb+L_.A+L_lb+0$\L_+!$D?#8/0+!/0=-aRlb+L_a*$,r!/0=
_H0Z",(oa!/0}a*$i(l_a=a**=js!/09H0Z8t$H(";,r/,("-=
!$_f*f`L_)AWf8lD9;+L$7"&'(H("1
`L_)A8/,9;L_-9(+-$gd`,rZ,9;,rgdR3iR]v"(l_=j
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.&'(8_};$*,*8/0}+f_;"8/,9;*_,r!/01
`L_)Alb+L_-9(+-$gd`,rZlb+,r!/0R3gdiR]v"(l_=j
,rfgdhR$_$+\L_!/0";}_fdgR,1
`L_)Alb+L_!/0-9(+-$gd
`,rZlb+,rR3gdiR]v"(l_=j
8_/,f#'8_iL$7"`+3&'(j8(o",,1
V ( ~ A , a ) = 1 V ( A , a* ) = 0V ( ~ A , a* ) = 1 V ( A , a ) = 0
,(o0".&'(L!/$DRDf_+aH0|Q+"Yf
gdhRL$7")*D!$L_H_}=gdhR
$m.&'(1
V(AB,a)=1 V(A,a*)=1 V(B,a)=1 (l_ V(A,a*)=0 V(B,a)=1
)A^+2k)A(__fhR+H__}-R3!l)*H_}+!$1
a = a**Rabc Rac*b*
"H6>~ (A ~ B) A B
,011 V ( ~ ( A~ B ) , a ) = 1 y2 V ( ( A~ B ) , a* ) = 0 V~
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P
3 ~ V ( ( A~ B ) , a* ) = 14 ~ xy{Ra*xy [V ( A , x ) = 1 V ( ~ B , y ) = 1]} V5 xy{Ra*xy [V ( A , x ) = 1 V ( ~ B , y ) = 0]} 0$&'(6 xy{Ra*xy [V ( A , x ) = 1 V ( B , y* ) = 1]} V~
7 xy{Rxa*y [V ( A , x ) = 1 V ( B , y* ) = 1]} _4;hR8 xy{Rxy*a [V ( A , x ) = 1 V ( B , y* ) = 1]} )A^hR9 xz{Rxza [V ( A , x ) = 1 V ( B , z ) = 1]} !$,\10 xy{Rxya [V ( A , x ) = 1 V ( B , y ) = 1]} !11 V ( AB , a ) = 1 V
,rf$R3{}"Y!R^$_$+g,0?5/0";=
N%N%
#dDH__",(oD+!$.&'()*`dD6dD!/$("(="/9_D;+8_+!$L!/$8_$+
/9?*(l!$8_"$=!*+H_-,9;L_!/0RL_9(D"@b_/'Z80vRh)*+)A"90+H_("=
8_Dd!6(m""$_UPU!(8+UPU!Z$+L!/$8_=y!8_3#n"t$m$8_R1-xf!lb++Sb+flb+
lb+R0x*}8_}-fL_0"$!lb+lb+gd0x,r/R/9wskA(l_R=+RD,r!$HnD$m8_H9
,"5RD$!$cR+83L_(fUU:,rD_f+_$,rRH("=
`$,?_"t$mUU:y!8_((0!$09f$!/$ + -f$-]"UPK " =,lb+ L_ !/0
},r-f$lb+8_2_l("=t_+$m8_cQD_f,rfH_fm=
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lb+,-f$+-f$"$/08_Rrf_0"@,1lb+W,lb++0$lb++"#5-f$,W+
8fZ-f$i=D|dA'(qfL_;+lb++,-f$,
$gd_D,r)A+lb++f_D,rZ"}-j="&'(L!/$-9/0f!,9;8/0!$+("
(l9rs_fr0m+e_!!"0-=0m+e_!8_fZ
-f$Z+-f$=/De_!8_,-f$,,D-""perp+orthogonality=il(l+
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U
(l+!$D-f$9f!$D,t1lb+a_q=lb+,"_0a}D-f$b+8_,r+la*+!/0a(=f
lb+,-f$"4r$9_+Rr7"90(3,(
R!-q+!$="}o9(D2_l8_D+!$"$8_-_++5,/00$!R?3*st"R!R=D8_?_,
hR_0Cq"-_fH_+r1=$,A!-f$C=lb+Dlb+00_;+-f$,r":=lb+/4}";+!lb+Dlb+L_-f$08_$
K=(!lb+-a(lb++4!b+cR-f$afL_0b+c4!$-f$_"=
1. x y ( Cxy iff Cyx )2. x y Cxy3. x y [ Cxy z ( Cyz z x ]4. Rxy(Cz) Rxz(Cy) [ (l_ w ( Rxyw Cwz) v ( Rxzv Cvy) ]
7%EN_n61$DH!-",(o;+)ASfz6!/$R+1_#!$R`+
,?_+(?__R++++_=
2_lS)ARf9oL!/$Ri__R1j#)A1A$gdA3gd+RA$]v"AR3]v"=C,-)A1~A$gdA+R]v"A$]v"ARgd=
}-ZDL!/$8_lb+08/n0]v"H0+gdH0(
lb++(Rv"+gdD*0]=f9oD4!H_W1
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CV
=gdTi~gd.A~{t}jC=]v"Fi~]v".A~{f}j:=+0Bi~]v"+gd~{t,f}j
K=0Ni~]v"gd~=j
Wf8_+r-_f`+;,_l/00H_1
True T {t} gdBoth B {t,f} +0Neither N {} 0
False F {f} ]v"
(" ;nDRf9oL!/$"gd"n+]v]v"gd=F+NngdF+BD8(/0(v"T+N]v"nT+B(*d=)*SD,("
_fd,,1
A ~A A _3_+ A ~A A
T F F {t} {f} {f}B B N {t,f} {t,f} {}N N B {} { } {t,f}F T T {f} {t} {t}
_mUUV_m$",-+#)*L!/$8/0CVV
WfD,r$"$"#)A_Rf9oL!/$0)A0L$7"Wf+f_d`T+F$=/D0/,.Z_m
#)A_;lZ$/f#+("%!$H("1
2_l)ASRf9oL!/$Ri_mR1j#)A1A$gdAR3gd+A$]v"ARgd=C,-)A1~A$gdAR]v"+~A$]v"ARgd=
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A A ~A _3_+ A A ~AT F F {t} {f} {f}B F B {t,f} {f} {t,f}N T N {} {t} { }F T T {f} {t} {t}
q$(/0D,r$""2_l}$W+#)A,
Wf9(`0#)AD_m2_l/L$7"0Nf2_l8_"#)AH_-1
2_l)ASRf9oL!/$Ri$R1j #)A1NAgd$AR]v"+NA$]v"AR3]v"=C,-)A1~A$gdAR]v"+~A$]v"ARgd=
_f`+;)AS"_A,1
)A # )A S )A # )A S
,- (,+ S_m S$
,- (,+ S_m S$
A ~A A A NA A ~A A A NAT F F F F {t} {f} {f} {f} {f}B B N F T {t,f} {t,f} {} {f} {t}N N B T F {} { } {t,f} {t} {f}F T T T T {f} {t} {t} {t} {t}
9oL!/$"HnstRfD.&'(f_0W7&'(0&3',
$".&'(?",r=+,-)AfS(+,$D`58_!;$L!/$8/0fD#)A=_"!!L!/$8_!*+Dq
'(fz6Z?6Dz53,rf!$-0DYs_/.&$`R+_=
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CC
kO5EYR
O5EY)*S8_(o+]Y"+gdS8_(oDQRS8_(oD.&'(H0f,
;+9r,";,L$7"&'(""}_/!R=D#)*,}_/+DD,-)*!-73*DH_=D*@]Y"+gd,}_/D8(/0T+F+gd+D
D_(l]Y"t+f-*R}D=QR,D,(""0}_/8_(o}0"vd7ZQH("1
R,}_/8#+QL$7"QR+'QR}_/D0$1D3#nD'QR
$2_l$A)A+#@"DAA5DL$7"QR$L$7"QRH*+,D_}_/1H*+D.&'(D)A"4rf1
L$7"QR8_(D#+,-HA#+,-H*+R12#j"]+A,-)A+#@jA#)A+#@"=
517@O5E
/bQR+'QR,D$}_/iEnthymematic implicationj$1QR
4!#_9(AD'0gd}-L_D/bQRD,9(m+/k$=4!#D'QD/bQRA/0gd}-8_0=3D_QR-ArB$/bQRp { P [ ( A p ) B ] }=
$(D.ZH0H*9o8_(_+H("*/L_0"$H_8t$9r^$1
1/12_l1
'QR2_l,+,-L$7"QRA B =\ ~ A B
#L$7"QRA B =\ A B/bQRA B =\ p { P [ ( A p ) B ] }
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C:
2_l!3#f/bQRa?9_UN:+(+,$U_+$UPV$`l2_l},r"H_+r1
/bQRA B =\ ( A t ) B
_k*2_l+8_,`l3{R$,$rD1
A BA B
p { p [ ( A p ) B ] }( A t ) B
A Atp { ( A A ) p [ ( A p ) B ] }t [ ( A t ) B ]
p { ( A A ) ( t p ) [ ( A p ) B ] }p { p [ ( A p ) B ] }
p { ( A t A p ) [ ( A p ) B ] }A B
p { ( A t ) B ] }( A t ) B
A B
_k*E*_2_lD_f`_f$(+,$2_lfEk*
1P ( t p )
_D;+8_UPV,!5D2_l+8_"0D/ + ,$(U"}!$_k*",DS4+$DA*D
9r/bQR_k*E_UPV3{Z/bQRH58/0("=&'(stCRD,("+H_+H0/bQR+#QR5"H_"+D
58_/R,/0Y-1K=H0#QR+/bQRi_k*1j
CR A B
CR A B
,01CR A B
CR A t B
CR t A B
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CK
CR t ( A B )
CR A B
ZH5,CR*+r$/94!D,rfDH/l1
ZH51CR A B CR A BZH5H/l1CR* A B CR* A B
4!1-A+B#0/*+r(RCR A B R A B
N=H0#QR+/bQR1
CR ( A B ) ( A B )
CR ( A B ) ( A B )
2Z,01k*D`+`-CRrR
CR ( A B ) ( A B ) y CR ( A B ) ( A B ) #}!$CR A ( A B )
CR A ( A B )
CR A ( A t B ) CR ( A t ) ( A B ) CR A ( A B )
CR A ( A B )
CR A ( A B )
CR A ( A B ) 8;/
CR A ( A B )
`8_M3&'(+RM3+$k*R_RM/3{R=yD8_(
$]v"=)A#L_D+`H_+r1
Rgxx, x g, V( A , g ) = V( B , x ) = 0 , V( A , x ) = 1
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CN
8_D#A tg+xD8_(D$]v"A t Bx$gd=_$fA Bx$]v"=_f`D4!
( A B ) ( A B )g$]v"=
=-A+#)**rR#QR
CR* A
CR* ~ A
,01 CR* A yCR* A f
CR* A f
CR* A f
CR* A t f CR* ~ ( A t )
CR* ~ A ~ t
CR* t CR* ~ A -*
`,#@*D.&'($$0`E+$D_k*,
)A=_k*,#@*-*,*8_)A`E,A+_k*-*W_Ym(=
P=-ArR#QR+#)**
CR* ~ A
CR* A
,01D?3**L/"
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C
=-ArR#QR+#)**
CR* ~ A
CR* A
,01 CR* ~ A yCR* A f
CR* A f
CR* A f
CR* A f
CR* A f
CR* ~ f
CR* A -*
U=,-+#)*,L$7"}!$1
CR* A ~ A
CR* ~ A A
,01$$=
517@O5E57oO5E
RQR,+}D0D+DD+0""2_l}_QRS+,9r+(!0/bQR/kQR+/b+QR0/D+
",_H_1
/bQRA B =\ ( A t ) B/kQRA B =\ A ( B f )
/b+QRA B =\ ( A t ) ( B f )
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CP
_D8#+D/b+QRUPVxC$"l=D/kQRl#$8_DtR=
O5E3b517@/QR8_9rfZ_f"50H_fm1
=QR8_/02lb0"(l8_D(!0'QRf
R ( A B ) ( A B )R ( A B ) ( A B )
R ( A B ) ( A B )R ( A B ) ( A B )
R ( A B ) ( A B )R ( A B ) ( A B )
C=2lbD/b+QRDd8/0+QR_$f$01
R ( A B ) ( A B )R ( A B ) ( A B )
R ( A B ) ( A B )R ( A B ) ( A B )
R ( A B ) ( A B )R ( A B ) ( A B )
R ( A B ) ( A B )R ( A B ) ( A B )
ZH5,0i$8m5,0fR!3"jk*8_D!DR;
("1
R ( A B ) ( A C B D )
ZH5,0D,("+1
R ~ A ( A f )1
R_k*R ( A f ) ( A t B f )2
f+CR ~ A ( A t B f )3
R ~ A ( A B )4
R B ( t B )5
R_k*R ( t B ) ( A t B f )6
fN+R B ( A t B f )7
R B ( A B )8
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C
fK+R (~ A B ) ( A B )9
R ( A B ) ( A B )10
d"H0,$"D,-QR/b+QRf}!$3{
?Q7"4!D}!$8_!$f FH$12Z,0yR ( A B ) ( A B )1
R t ( f f )2
R f ( t f )3R_k*R ( t f ) ( ~ A t A f )4
R ( t f ) ( ~ A
A )5
f:+NR f ( ~ A A )6f+R f ( ~ A A )7R f ( ~ ~ A A )8R f A9
8;/UR f F10,0,_m=
:=k*+/b0*/k+k*f0i,-j"(l8_D(!0
If R A B then R A B
If R A B then R A B
$$,0=
K=k*+(!0,_D/b++,-01
If R A B then R A B
,01yR A B1.
2_lR A t B f2.
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CU
}!$R ~ ( A t ) ( B f )3.,-R ~ A ~ t B f4.2_lfR ~ t ~ A B ~ t5.
R ~ t ~ A B6.-*R ~ A B7.
2_lR A B8.
N=QR8__k*,D8_($*_f.+D01
=
=
=QR8_Z,$H"5_.+D01
P=DAA5+*/k+/b*_k*,-)A^*k*+/b_k*L_,-)A^D/k_H_(l_D_1
R A B
R ~ B ~ A
R A B
R ~ B ~ A
,01)A^",-+QR8_2_l+/b0=
7/29/20