Devil's advocate

Meaning: Someone who plays "devil's advocate" is a person who argues an unpopular opinion for the sake of the argument.

“魔鬼代言人”是在争论中故意唱反调的人。

Example: So let me play devil's advocate and consider the positive case for buying a home right now.

那么让我来唱反调吧，让我考虑下现在买房的积极例证。