trista_cheong

Originally posted by playbr2 at 2006-10-18 06:35 PM:' x1 W0 V% f  \8 k4 S/ b

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& |1 p+ U8 T) z7 w  u9 M4 F咪就係話你醒過頭,所以吾會明其他人吾明D咩囉

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guswan

Originally posted by trista_cheong at 2006-10-18 16:10:2 G( U% S: y: d1 _7 ~; ?+ X

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李天命d 書聽聞非常正

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睇晒李天命都只得7分..............

pigcat

9分ja~~

trista_cheong

Originally posted by guswan at 2006-10-18 10:26 PM:
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+ t. B9 z/ _2 n; X$ o睇晒李天命都只得7分..............

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7 分好多ga la wor 你仲想點?

Chingy

0-13分者为优秀（上限10％）；14－19分者为良好（20％）；20－25分者为中等（30％）；26－48分者为不佳（下限40％）。你的分数是13分，属于优秀。: o' H) k; C1 D4 w# K
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first time do it...not a bad grade) s: J& V0 J. o/ A, L" Z

, V2 j- q6 D: Q1 {: @[ Last edited by Chingy on 2006-10-19 at 07:31 PM ]

clkgtr

Modus ponendo ponens
$ A+ s1 d' @& h" P9 o; w. b1 BP --> Q, 因為 P  所以 Q
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Modus tollendo tollens, d, X3 V4 P1 z( }
P --> Q, 取得 ~P  所以 ~Q: K! w8 T3 p$ u7 u. R
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Disjunctive syllogism0 M; e2 d1 X; `
P or Q, 取得 ~P  所以 Q9 G. _3 T0 D7 r. C1 Z' D
P or Q, 取得 ~Q  所以 P
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Conjunctive syllogism! I* n, t, p* l
~(P & Q), 取得 P  所以 ~Q
/ g' X* A7 @6 @' R) X~(P & Q), 取得 Q  所以 ~P; `3 Q, g5 V: U6 G3 Z

: R' Y0 m2 N. ]: M; xHypothetical syllogism# ?3 y& s) J) l2 w
P --> Q, 取得 Q --> R  所以 P --> R% \0 F$ _' v8 s% O& T) j
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De Morgan's theorem6 C( k8 |8 `0 k
~(P & Q)  所以 ~P or ~Q2 ]8 G2 ?/ D( w0 s! J
~(P or Q)  所以 ~P & ~Q