How to tell the truth to parents?

The following is an excerpt from a samvaad (dialogue) session with Acharya Prashant.

Question: When I used to ask questions to my mother and father, we would have conversations, and our conversations often ended on a bad note. My brother and sister would say, “You better not talk to them like this, because if you are right, then they are wrong; and if they are wrong, all these years which they have lived…