Two blondes, Jane and Sarah, were deep in a philosophical argument.
“Since you’re so damned smart,” Sarah says, “answer this question: why is it that when a slice of buttered bread falls to the ground, it’s bound to fall on the buttered side?”
Jane snorts, “It doesn’t always land on the buttered side.
Here, I’ll prove it.” She gets out the loaf of bread from the cupboard.
Out comes the butter from the fridge.
She generously butters the bread. Then she drops it. Butter side up.
“You think you’re so smart. You just buttered the wrong side of the bread!”