When he condescended to speak, he contradicted himself three or four times in the space of half an hour.

当他屈尊讲话时，半小时内有三四次前后矛盾。

《柯林斯英汉双解大词典》

He contradicted himself.

他自相矛盾。

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Peter Waterman contradicted himself finally as he said that no number of exams will make you popular or successful in the music world.

当他说没有任何的考试可以使你受宠于音乐界，Peter Waterman最终与他自己的论点相互矛盾。

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Jury forewoman Dana Nash said it was a difficult decision because of Rafferty's age, calling him "a child", but that jurors were sceptical of some of the 17-year-old's testimony, saying they felt he contradicted himself.

BBC: Craigslist killer accomplice Brogan Rafferty convicted

In a recent interview with an Indonesian magazine, he said he meets Miss Megawati frequently, but then contradicted himself and said they hardly meet at all.

ECONOMIST: Indonesia��s dangerous politics | The