[Karak567]

I think you need to figure out what % of the time he is lying and what % of the time hs is telling the truth.

Then figure out if he is telling the truth, how often he has 2s or 3s and how often you will win then.

If he has a higher PP how often will you win?

If he is lying, it is most likely a coinflip, how often will you win?

Put all these numbers together and get your EV!

Or you could just take the chop :-P.