You should fold the hand of yours, although you need to raise the bet of yours to 70 anyway. Bet when you are about to beaten by your opponent's hand, plus you're unsure in case you have a decent hand. You bet 80 from forty. Your opponent raises your choice to ninety. You can't tell if they've a great hand, so you think it is better to improve your bet. They play because it is more handy than...