Devils advocate,

Definition of Devils advocate:

1. A person who expresses a contentious opinion in order to provoke debate or test the strength of the opposing arguments.

2. Person who identifies and challenges the flaws in an assessment, plan, or strategy.

How to use Devils advocate in a sentence?

1. I liked to take the opposite opinion when me and my friend argued because we really enjoyed playing devils advocate with each other.
2. You may need to play the role of devils advocate in a meeting to make sure everyone has thought through all the options.
3. Someone at a meeting may play the role of devils advocate to try and find out what your plan is if things go wrong.
4. The interviewer will need to play devils advocate, to put the other sides case forward.