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My point is, it is impossible to know, he could have 32o or AKs. And he would put me allin on a later street if I don't show aggression.

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This is a good candidate for showing some weakness by calling and playing postflop with him. If the flop hits your hand hard you could be in good shape to take his whole stack. If you think his range really is that wide how can you consider not playing with him?