[djj6835]

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i should add that in most hands of my own that i can remember where a bad player took this line, they were almost always:

a)bluffing
b)never folding


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This is basically what I was thinking. He either has next to nothing and will fold for any amount or he has a decent flush and is never folding. I would just shove.

I really don't think this is ever some marginal diamond that will look you up if you raise small.

edit: if he bet like 40 I would like a small raise more, but his bet size looks more like straight value with a good diamond or a bluff.