i don't understand this - can you explain a bit more plizz?
Say you're heads up oop in the bb against him, he limps in the sb and you raise to 3x, and he folds 57% of the time. Pretend that when he calls you always loose. Then your EV is:
- 57% of the time he folds and your profit is 2bb
- 43% of the time he continues and your loss is 2bb

so EV = 0.57*2bb - 0.42*2bb = 0.3bb

So even if you always loose when he calls, you still make a profit just with your fold equity.