that fulcrumed point of sharp intersection

Does "that fulcrumed point of sharp intersection" mean point A or point B on scissors, according to the image?

Context:
My pear had bird’s-egg specklings of a delicacy I’d never before seen on a pear, and seldom on a bird’s egg, either. It wasn’t quite ripe, though; it didn’t have that superb grittiness of skin, when the flesh dissolves and the disintegrating skin grinds against your molars. Apple skin must be chewed heavily and steadily, and even so its slick, sharp-cornered surfaces survive a lot of molaring. But eating a ripe pear is similar to cutting a piece of paper with a pair of scissors: you feel the grit of the cut paper transmitted back through the blades to your fingers, you can sense that fulcrumed point of sharp intersection. (Nicholson Baker)