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WIth his call of your preflop and his big lead post flop, I tend to think he either has AA or QQ. Either way you are in trouble. I lay it down.

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It's fair to note that opponents don't always play so solidly, or only aggressively with truly big hands. I've watched a number of opponents play this exact way with TPGK/TPTK Just a draw, or even second pair.

It very muchly depends on the current state of the game and what has happened in the last few hands