[graarrg]

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I agree, do you really think he is bluffing the river? You can only beat a bluff.

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Not necessarily. That table had seen me pound pots heads up to win showdown with top pair/top two. It's definitely possible that someone in that situation would raise the river with trips to scare me off (or at least try to push someone playing like a sissy off with a bluff). The size of the pot also would make it worth a call, wouldn't it?