某一天，傳教士到某土人聚居的土人村，在路中有一個 ”Y”字形的分叉路。5.39.217.77:8898# a+ x9 R% N" I% i, J
傳教士只知道一條去誠實部落，另一條去說謊部落。/ H# V0 u) J5 P! Z1 U3 x
3 a: x5 u, C% Z. O& C% Gtvb now,tvbnow,bttvb在他面前出現了來自不從部落的兩名土人，一名高個子，另一名肥個子。已知一名是誠實部落的土人(絕對誠實)，另一名是說謊部落的土人(絕對說謊)。但不知道誰是說真的土人。9 G% F! D. g" a' _7 k5 N. b
Assume the fat guy is talking the truth. He says the tall guy said yes, when the professor asked whether he's speaking the truth or not. Then the fat guy says the tall guy is the liar. So if the tall guy is the liar, when the professor asked him whether he's speaking the truth, he lied. This makes sense.5.39.217.77:8898, P2 i; n. u0 W0 D, L
TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。% @" v6 n( D! U. F- D
5.39.217.77:8898: b; ^* W R( m) Y/ a
What if the fat guy is the liar? Then the tall guy will be saying the truth. 2 w/ J) P* ~, ?. [tvb now,tvbnow,bttvb 9 W |+ Y9 u8 q( H8 s( M% C% LTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 8 Z- Y0 F" G, q
Fat guy says tall guy answered "yes"(no), and that the tall guy is "the liar"(the one who speaks the truth) So if the tall guy is indeed speaking the truth, why will he answer No when the professor asked him? This assumption does not hold. 8 g% z1 j/ p. H( t + F9 Z" X) d- o9 V; H% ^7 F0 m tvb now,tvbnow,bttvb& J" j* x |6 \8 v. L; x0 y0 Q
So the fat guy is talking the truth! 7 e H8 g4 H- e2 GTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 5 s! i4 q) `# I公仔箱論壇 " S5 B7 w% y: G% |5 W P9 y1 J. ~1 t6 Y" C& g
[ 本帖最後由 Culgan 於 2007-9-24 12:27 AM 編輯 ]作者: smsl 時間: 2007-9-24 12:45 AM
the fat one
4 V. {1 I' ?! A( z) l- j+ v
