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in a CO vs button situation wes, i think even this player is capping AQ/99 with some regularity.

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If this is what you think, then calling the river is certainly correct. I still think calling down is the best line for the hero postflop. My perception is that most solid players will not cap with AQ or 99 OOP even in a CO vs Button situation. Which is why I said I would fold the river. My view of this situation can certainly be misguided, but thats the framework I am working with here. Against many other opponents this would be an easy river call, but against this guy I would fold the river. I am interested in what others may see as the "typical range" of a solid player who caps out of position in this steal/resteal situation.