作者sorrow12345 (我和白木住一起)
看板logic
标题[请益] 题目两题请教
时间Tue Feb 24 16:16:48 2009
这是今年某大学哲学研究所的推荐甄试考题，请教各位高手不吝赐教^^
"Lxy" stand for "x loves y"
"Hxy" stand for "x hate y"
"Px" stand for "x is a philosopher"
Please symbolize the following two sentences
1.There are exaclty two philosophers who love the same philosopher.
2.Every philosopher hates every other philosopher unless someone who is not
a philosopher loves them.
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1F：→ krisnight:这种东西该自己念，找逻辑教科书，从头念到述词逻辑那章 02/27 22:30
2F：→ krisnight:，你就会了。 02/27 22:30
3F：推 YuGar:Px, Py, Lxy, Lyy 一行解决 02/27 23:43
4F：推 fourchette:楼上的回答有问题。那只是其中一种情况而且没"exactly" 02/28 22:57
5F：→ fourchette:这种东西要自己用想的。光用念的很难"透彻地"了解。 02/28 23:01