[oxymoron]

[ QUOTE ]
The thing that really confused me about this hand is this:

Why would he not check raise with a good hand? Even if I was betting with air on the flop he could guess that at this point I had at least one pair. The only hand that makes sense to me other than a bluff is A-rag.

[/ QUOTE ]

I wouldn't spend too much time in the mind of why a Donk does what he does - your head will hurt. The donk probably read somewhere about the semi-bluff and figures that it applies here since he has one [img]/images/graemlins/heart.gif[/img] or possibly others have folded to him here so he bets. I agree with the OP though that normally this means the donk just has a [img]/images/graemlins/heart.gif[/img] and is betting it out.