Made Hand v. Opponent Drawing for a Flush -- Proper Bet Size

[Lawman]

The idea is to make your opponent make the biggest mistake possible. You can't really do much here if he is 100% sure you have the set and you are 100% sure he is on the draw. If you don't give him the correct pot odds to call he must fold because he has no additional implied odds since you will fold if the flush comes in. Equally you cannot give him the correct odds to call because a call by him is then the correct play and you haven't induced a mistake. If the flush comes in you have then lost a pot you would otherwise have won.