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So are you contemplating raising to induce him to bluff? I'm not sure I understand the question in this hand.

Call.

Lots of baby X's or sets would check raise this river and turn their hand into a bluff? :) I think they would just value bet.

Villain is passive. How many passive opponents have you seen C/R...

You should fold river despite odds. Perhaps at higher stakes and against a more aggressive opponent a call is in order. At 100nl when you get check raised on the river in a spot that contains few...