gaash,

I think you need to understand pot odds better in order to make the right decision.

You would never have to overbet the pot to take away the odds. If you have your opponent on a flush draw....he's about 4 to 1 (slightly lower) to hit his hand. a bet of 1/2 the pot gives him 3 to 1 pot odds (marginal call). If you want to make the odds worse, increase the bet a little more..... 1/2-3/4 pot. If you are worried about implied odds with 2 cards to come up it even further.....pot sized bet or so. If you were wrong and your opponent is holding 2 pair or something you fear has you beat, you are not getting crushed and can slow down or get away frm hand completely. In actuality, if you make the 3/4 to pot size bet and get called, you can assume 1 of 2 things.

1) The guy is a fish and took bad odds to chase a draw.....good for me.
2) The guy has a hand that he willing to fight over.

Against a good player I would assume #2. Now I might play the hand a little more cautiously depending on my holding.

Against a pure fish that I know to be a chaser I have a tougher decision.....maybe he does have something, maybe not...but at least I made him make a mistake if he was chasing.

It's all about having a read on your player. You have to bet to get information, so your bet needs to be strong enough to take away drawing odds, and low enough to give you the info you want without busting your stack.

I would have to assume that overbetting a pot by 2X would be -EV. Either they fold, or you are called by a hand that has you beat.

Example: 100 pot. You bet 200. When a fold occurs you win 100. When a call comes you lose 200. You would need the guy to fold 2 out of 3 times just to break even.

with a 1/2 pot bet that is reversed and you need only 1 fold to break even.