Is it hypocritical to confront a lie with a lie or is it an accepted method given circumstances? For example, you found out for sure that X person was lying to you about something important. But to confront X, you have to reveal how you found out about the lie. Supposing the method used in obtaining that information would make you look bad (and X angry at you, for a reason): would you lie about how you found out about it so the topic can focus on the X lie you discovered (maybe excuse your lie because X hasn't been honest to you either)? would you tell the truth about how you found out about it, nevermind if you look bad or X gets angry because well, bottomline X lied to you so it doesn't matter anymore? How would you handle it?