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Check-fold the flop. You have an underpair and a 1-card ass-end draw to a losing straight. Do you want to make trips? I think not.

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I disagree with this strongly. Heads up, your draw is likely to be good, or your set will be good, or both. Of course, occasionally he has QJ, it's hard for him to have a queen and a pair, and even then you're drawing to 6 outs.