Aristotle and Plato walk into a bar They are debating plenism, the physics of the void and how true emptiness could possibly exist in a world of matter that would immediately fill it, when Aristotleâs friend Nathan comes in with his dog. It is a borzoi. âIs that a new dog?â asks Aristotle. âYeah, this is Montyâ says Nathan. âDidnât you already have a borzoi?â asks Plato. âYeah - three actually. But theyâre so much fun, big old goofballs! Heâs got a brother and sister at home too. And I got recommended a local breeder so Iâm going to go check out his place tomorrow, maybe pick up a couple more.â So Aristotle says âNate, youâre a borzoi vacuumâ