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I hate bet/fold in a big pot.

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I hate bet/fold also, however if you take the check/call line, you win the least when you're ahead, and you lose the most when you're behind. If you bet/fold, you lose the same you would lose when you're behind, but you win more when you're ahead. The only risk to bet/fold is getting blown off a winner by a LAG/TAG--and this is a real risk at 10/20 (as opposed to 5/10)--so against those player types I think check-call is right. But against more predictable opponents who wont raise the river on air, bet/fold is a painful but necessary line.