re: Poker & Continuation bet
The crucial question is not which hand you raise preflop but which hand you represent. If you show strength preflop and also on the flop you represent a premium hand such as QQ + or AQ +. With an overpair you are of course favorite against every middle pair hit, with 2 overcards you might still be an underdog against an opponents pair on the flop, but on the turn and river it could change dramatically if you hit your top pair. And if the opponent has a weaker ace or a draw that does not work, you are favorite again.
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