Shoving over a donkbet in a 3bet pot

[ebalf]

I think your big raise is bad.
SB cold-called a preflop-RAISE with the initial bettor still behind him.
That means he isn't really afraid of a re-raise.
Forget anything less than AK or pocket pairs.

Since he bets out I assume he hasn't got AK (two aggressors behind him he has to believe that at least one of them will call).
So I think it's basically an overpair or a set.
Only a minor chance that he's got AcKc.

He'll only fold a medium overpair. I think QQ and above will call. And of course sets.
So where does your +EV come from?

[Jay Riall]

They usually aren't folding imo.