His WtS is 15, and his W%S is 71. He is really quite aggressive and I don't often get to see his cards.

These stats are over 350 hands.

I think b/cing may have been better because of the pot size. But then again I don't think this is a bluff that often. I think we get raised by AK somewhere before this river, but he could be being weird.

So either a worse K, really slowplayed set, Jx. In my opinion the Jx is probably a high majority, but I don't know the number. The question is do we win >12.5% ?

True