作者susophist (窄宅)
看板logic
标题Re: [请问] 真值表法 真假状况
时间Thu Jan 16 20:34:06 2014
※ 引述《C87 (D90)》之铭言:
1.
P.....Q.....~P.....PVQ.....(PVQ)Λ~P.....[(PVQ)Λ~P]→Q
----------------------------------------------------------------------------
T.....T......F......T............F...................T
T.....F......F......T............F...................T
F.....T......T......T............T...................T
F.....F......T......F............F...................T
真值恒T(恒真句)
2.
P.....Q.....P→Q.....(P→Q)ΛQ......[(P→Q)ΛQ]→P
----------------------------------------------------------------
T.....T.......T.............T...................T
T.....F.......F.............F...................T
F.....T.......T.............T...................F
F.....F.......T.............F...................T
真值不一定T或F(适真句/偶真句)
3.
P.....Q.....PVQ.....P→(PVQ)
-------------------------------------
T.....T......T........T
T.....F......T........T
F.....T......T........T
F.....F......F........T
真值恒T(恒真句)
4.
P.....Q.....~Q.....PV~Q......P→(PV~Q)
-------------------------------------------------
T.....T......F......T..........T
T.....F......T......T..........T
F.....T......F......F..........T
F.....F......T......T..........T
真值恒T(恒真句)
5.
P.....Q.....~Q.....PΛ~Q......(PΛ~Q)→P.....[(PΛ~Q)→P]→Q
-------------------------------------------------------------------------------
T.....T......F.......F................T...................F
T.....F......T.......T................T...................T
F.....T......F.......F................T...................F
F.....F......T.......F................T...................T
真值不一定T或F(适真句/偶真句)
6.
Q.....~Q.....~QΛQ
-----------------------
T......F........F
F......T........F
真值恒F(矛盾句)
: 其他回答是这样的,好像不能跟您的比对谁对谁错耶
帮你"对齐"语句主连词之下的「真假值」,我认为你(们)都做对了。
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◆ From: 140.114.118.67
※ 编辑: susophist 来自: 140.114.118.67 (01/16 20:38)