simple game theory question

[Yepitis]

Once you are reraised in a limit game why would you take it any further with no chance of winning?
If he has called and raised a couple of times why would he ever fold instead of just calling?
Unless you are saying he is on a bluff also and you both believe this and are both just trying to get each other to fold so you don't have to split the pot since neither of you can beat the broad.
I play low limit so I would never raise on the river and fold to one more bet no matter what I had. I would just use that fact I couldn't beat his 4 high as table image...heh.