A good question

Popular wisdom allows us to become intellectually lazy. A classic case of pop-wiz is the use of the phrase ‘That’s a very good question.’
Delivered in Q&A session, generally after the speaker has finished his/her speech, the phrase is blatant use of linguistic bribery to keep the audience in check.
It usually describes the dumbest question or, rather, the question the speaker most expects or is most ready answer.
A good question will leave the speaker confounded and expose hypocrisy or factual error, or ideally criminal intent. Remember, if they cut to a commercial, the question was good.