Comment by jstanley

The entire universe is like chess.

Yes your opponent can make a move and you don't know what move they'll make. Chess is like that too.

I'm not saying this is in fact a good way to win a physical fight.

I'm also not saying the optimal move is unique. If 2 moves have the same utility then they can both be optimal.

What I'm saying is that just because you don't know what is the best move doesn't mean a best move exists.