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50$ NL, 50$ stacks (100BB)

I have A [img]/images/graemlins/spade.gif[/img]K [img]/images/graemlins/spade.gif[/img] in SB.

UTG raises to 1$ (meaning nothing), MP calls (meaning nothing, hes unknown BTW), so I raise to 6$ trying to take it down preflop.

BB (rockish) cold calls, MP calls

Pot 17$
Flop A [img]/images/graemlins/diamond.gif[/img]6 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/club.gif[/img]
-- I bet 13$, BB folds, MP pushes

It's 33$ back to me getting 2.3:1

a) What's your read?
b) Do you fold?
c) Why or why not?

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FWIW, I see that most people are telling you this is an easy call. In my experiences in 50NL--especially against unknowns, in other words players you aren't sure about their suckiness, when they play back at you for the rest of their chips (he did still have $33) they can usually beat TPTK.