[nokia1566]

Unless the villain makes tricky plays (like bluff raising the river), wouldn't bet/fold be a fine line? If he was calling the flop to raise the turn with top pair and the A scared him then he isn't raising the river with top pair. Same with any other pair, and it doesn't seem like he was drawing because he didn't bother semi bluff raising the flop or the turn. Looks like some pair that you beat to me, and because he called the flop and turn, it looks like he is calling the river.