An example of a troll is: A banker who committed crimes who is now being questioned explicitly at a hearing and replying, "I'm sorry Your Honor, I don't understand the question." Another example is a rando on the internet asking people to define what a troll is.

Oh wait no, the best one is Bill Gates refusing to cooperate during his antitrust deposition: Boies: What non-Microsoft browsers were you concerned about in January of 1996? Gates: I don’t know what you mean “concerned.” Boies: What is it about the word “concerned” that you don’t understand? Gates: I’m not sure what you mean by it. Boies: Is— Gates: Is there a document where I use that term? Boies: Is the term “concerned” a term that you’re familiar with in the English language? Gates: Yes. Boies: Does it have a meaning that you’re familiar with? Gates: Yes.