Wy do you suppose people answer questions when they clearly have no idea what the correct answer is?

I’m referring to reference questions where people just take random guesses as to what the answer may be, rather than researching or just not answering.

I’m obn a few different Q&A boards and I see this quite a bit. Obviously giving an incorrect answer isn’t at all helpful, so what’s the motivation to do that?

I guess this is a somewhat random question, so opinions and guesses are welcome here :)