[Ginogino]

JTG51:
It's really tempting to analyze the betting to conclude that he couldn't have anything that beats you.

AA -- might re-raise preflop; would be afraid to check-call the flop for fear you have a singleton diamond and will catch a cheap diamond in the next 2-cards.

JJ -- ditto AA

AJ -- has to re-raise you on the flop to see if you really have the flush; would he lead-bet the turn with two-pair most of the time?

AT -- Just plain unlikely

A8 -- would have to be suited to be even arguably pre-flop open-raise material

KQd, Q9d, 97d -- monsters under the bed; the lower two hands are not open-raise material preflop.

(There are other inferential reasons for many of these conclusions than I have listed.)

But the truth is at this limit your opponent may not be thinking too much about what you are holding. He won't imagine that you might have a full house (you've mostly been representing a flush). He does have a flush, maybe King high (the nuts) with something like KK or AK.

I think you could re-raise him on the river. But I sure understand why you'd just call here.

Gino