trista_cheong

Originally posted by playbr2 at 2006-10-18 06:35 PM:0 _1 y/ X/ D8 r$ r/ L

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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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4 H4 K9 ]# i3 |+ G2 O" U. z6 ~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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$ [# U) w. J7 u8 Z睇晒李天命都只得7分..............

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5 Q! q$ E  y( I6 v' ^9 b+ }& M& T7 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。5 k+ \2 ]+ R1 E! ^8 _5 F- N

; c) T+ p  C, ?- ~* K3 f6 S2 {  r/ ]first time do it...not a bad grade
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; z9 X# o1 O, Q! |+ A3 Z# Z! u[ Last edited by Chingy on 2006-10-19 at 07:31 PM ]

clkgtr

Modus ponendo ponens
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Modus tollendo tollens/ {4 w) O) G/ f
P --> Q, 取得 ~P  所以 ~Q8 D1 U7 U$ i4 \4 _+ \/ e' `# X$ Z2 v

: ?" w; O) b/ J2 p. U! w# ~Disjunctive syllogism1 g7 G# c( ?3 y- S- g5 i
P or Q, 取得 ~P  所以 Q
/ h6 ]' t: `  z  l6 f9 R: a  oP or Q, 取得 ~Q  所以 P
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" W  f* C; Q: E9 O" T9 Q- s6 P1 O3 _Conjunctive syllogism
& ^1 A% K1 t+ ~0 D9 o! P~(P & Q), 取得 P  所以 ~Q: ]7 w. i( X# b
~(P & Q), 取得 Q  所以 ~P
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Hypothetical syllogism
+ b3 h8 F0 p7 m# }; \( ?' c. f( bP --> Q, 取得 Q --> R  所以 P --> R
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De Morgan's theorem3 s: f/ c! Y3 C! I
~(P & Q)  所以 ~P or ~Q
6 {0 T6 O8 B& @# Y. s  I~(P or Q)  所以 ~P & ~Q