2. 职称英语
  3. Peter, David and Paul said following sentences: Peter: David is a liar, Paul al

Peter, David and Paul said following sentences: Peter: David is a liar, Paul al

游客2023-10-15  37
问题 Peter, David and Paul said following sentences:
Peter: David is a liar, Paul always tells the truth.
David: Peter is truthful.
Paul: David is a liar, Peter is truthful.
Two of these men always tell the truth, one of them sometimes tells the truth and sometimes lies. Which of these men is a liar?
选项
答案 David．
解析 (Peter和Paul都认为David is a liar，三人中只有一个人有时会说谎，不可能两人同时说谎，所以David是说谎的人。)
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