It is entirely true that "tu quoque" is a logical fallacy, it being a specific case of the ad hominem one. The truth or not of something is not dependent upon who says it nor either what they've said ...

Speak like an insider! Welcome to Snopes-tionary, where we'll define a term or piece of fact-checking lingo that we use on the Snopes team. Have a term you want us to explain? Let us know. Also known ...