What is the meaning of the fallacy known as "tu quoque"?

The fallacy known as "tu quoque," often translated as "you too," occurs when an argument is dismissed or countered by pointing out that the other party is guilty of the same behavior or issue they are criticizing. This creates a diversion from the original argument by shifting focus to the opponent's alleged hypocrisy rather than addressing the validity or strength of the argument itself.

In essence, instead of providing a rebuttal to the original claim or question, the "tu quoque" fallacy seeks to undermine the opponent by casting doubt on their credibility based on their actions. It highlights a failure to engage with the actual argument presented, instead opting for a tactic of deflection. This is why this choice accurately reflects the meaning behind the term "tu quoque." The other options either describe different types of logical fallacies or do not capture the essence of "tu quoque," which centers on the notion of hypocrisy as a means to avoid addressing an argument directly.