trista_cheong

Originally posted by playbr2 at 2006-10-18 06:35 PM:
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6 D, v8 d% U1 i3 u' a; ~* a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:
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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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睇晒李天命都只得7分..............

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5 l: ?0 D7 p- a0 }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。
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first time do it...not a bad grade
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. e( N3 Z! m0 o6 J[ Last edited by Chingy on 2006-10-19 at 07:31 PM ]

clkgtr

Modus ponendo ponens
' ?1 [6 }+ c9 e; u# E7 e; d& ]P --> Q, 因為 P  所以 Q' y6 u! z2 ]* Z8 O7 s

6 }, B: A8 E, H% @1 o% R9 D1 T! @Modus tollendo tollens
+ o1 H5 B6 p0 aP --> Q, 取得 ~P  所以 ~Q
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: M6 s( Z7 |* ]1 W6 C7 QDisjunctive syllogism
9 v" o8 v1 x$ N, `- S1 RP or Q, 取得 ~P  所以 Q
# ?+ W9 c2 F; u9 ]3 E1 fP or Q, 取得 ~Q  所以 P
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1 x! f& ~# z  x0 s5 {) N7 ^Conjunctive syllogism4 |5 J, }6 Y. b  c4 g
~(P & Q), 取得 P  所以 ~Q0 P0 t+ ~7 G6 e, b, t: y' M
~(P & Q), 取得 Q  所以 ~P
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Hypothetical syllogism+ y7 P4 H& c- f
P --> Q, 取得 Q --> R  所以 P --> R
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De Morgan's theorem
) Y. L0 @2 J! @8 b% S- _2 V~(P & Q)  所以 ~P or ~Q, M0 }* f( C! ~+ J
~(P or Q)  所以 ~P & ~Q