[jba]

[ QUOTE ]
if we concede it's possible he has JK then we also has to concede it's possible he has 28o.

[/ QUOTE ]

IMO there is a very good chance that he's not going to bluff-cap with 28o and will just fold to your 3bet. it's not like he's going bang-your-head-against-the-wall crazy here, and I don't think there's any reason to believe he is going to continue his bluff if you make the very strong move of 3betting here which means 3betting against hands like 28o have no value. we need to find hands with value that will call our 3bet, or come to the conclusion that he is in fact a monkeydick that will continue his bluff with unreasonable hands in order to 3bet here.