NL100:JJ vs laggish, rather bad villain. Standard?

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I've called / and or raised him quite liberally PF cause I felt I had a good read on him

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Has he been calling 3-bets out of position liberally?

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would be able to take pots away from him post flop.

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Your read makes it sound like he folds too much after the flop. If you think he does this with flush draws and top pairs A10, K10 types of hands it is a call. This is why the preflop read is so important, because if we can eliminate junky top pair and other crap hands this is a clear fold.