Here's the situation, in broad outlines. I'm on the button in 6max and raise 3xBB with A8. One caller from the big blind.

The flop is 554. He checks, I make a standard continuation bet, he calls.

The turn is a jack. He checks, I check behind.

The river is an 8 giving me second pair plus the 5s. He bets the pot, I call.

Do you like this call, or not? My logic was this: with my pretty standard line (raise pre-flop, continuation bet, then a check showing weakness on the turn) he knows (or thinks) that he can steal the pot from me with a forceful bet on the end. He also may think that I think he is slowplaying the trip 5s, although I do not in fact think this. The particular size of the bet on the end - pot-sized - led me to believe he did not have a 5, and his check on the turn led me to believe he did not have a jack, either.

So that was my thinking, and why I called. What do you think? I will tell you the outcome in a bit.