[Ixnert]

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Why did he show AQ, AK, AQ? I don't think it's because they're at the bottom of his range.

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I think this is an important point. Did he show AQ, AK, AQ because he was called down on each hand, or did he show his cards gratuitously? If the latter, there's a decent chance I call here; if the former, I don't even consider it because most people tighten their raising range after they've raised several hands in succession (and I'm willing to take the small EV hit to not have to worry about whether this guy is one of the small minority that doesn't).