自相矛盾

他先是说不会迟到，后来又说可能会晚点到。

tā xiǎn shì shuō bù huì chàolái, hòu lái yòu shuō kě néng huì wǎn diǎn dào.

At first, he said he wouldn't be late, but then he said he might be a bit late.

她一边说喜欢环保，一边却经常开车出行。

tā yī biān shuō xǐ huān huanbǎo, yì biān què zhēnguò cháng jiàng kāichē chūxíng.

She says she likes environmental protection, but she often drives.