If I was presented with logic puzzles in which I had to choose A, B or "unknown" with the puzzle providing basic demographic information on A or B and nothing p

If I was presented with logic puzzles in which I had to choose A, B or "unknown" with the puzzle providing basic demographic information on A or B and nothing pertaining to the actual question, I'd be quite happy collecting my winnings betting on "unknown" being the answer my interlocutors expected every single time...