[Stinkybeaver]

I don't think this is 50/50 this player have only raised 3% preflop over 480 hands and now he is 3-beting us. Which top 3 hands do we beat besides AKo and AKs. this guy is not 3-betting AQ here..

So I give us 30-40% of having the current best hand with villian having some outs.

But theres definately good reason not to go to war since if we raise then villian might call flop and raise the turn enabling us to make a bigger mistake if we don't fold there.