Joseph: My encyclopedia says that the mathematician Pierre de Fermat died
in 1665 without leaving behind any written proof for a theorem that he
claimed nonetheless to have proved. Probably this alleged theorem simply
cannot be proved, since---as the article points out---no one else has been
able to prove it. Therefore it is likely that Fermat was either lying or else
mistaken when he made his claim.
Laura: Your encyclopedia is out of date. Recently someone has in fact
proved Fermat’s theorem. And since the theorem is provable, your claim---
that Fermat was lying or mistaken---clearly is wrong.
C 50. Which one of the following most accurately describes a reasoning
error in Laura’s argument?
(A) It purports to establish its conclusion by making a claim that,
if true, would actually contradict that conclusion.
(B) It mistakenly assumes that the quality of a person’s character can
legitimately be taken to guarantee the accuracy of the claims that
person has made.
(C) It mistakes something that is necessary for its conclusion to follow
for something that ensures that the conclusion follows.
说laura错在把必要条件当充分条件，所有不能被证明的定理，其提出者要么说谎
要么犯错误。”不能推出“所有能够被证明的定理，其提出者就没有说谎或者犯错误
(D) It uses the term “provable” without defining it.
(E) It fails to distinguish between a true claim that has mistakenly
between believed to be false and a false claim that has mistakenly
been believed to be true.
貼出完整的問題和cd上的解釋
我想問C選項怎麼翻譯？句子好繞口喔
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