"shells, meat, sauce, lettuce, tomatoes and cheese."
Yeah yeah, and all those are made of either animals or plants, animals feed from plants so we only get plants, plants have cells, which are made of molecules, which are made of atoms, which are made of protons and neutrons, which are made of quarks, quarks is a fundamental type of matter, so we can't go further. This proves tacos are made of matter, and even if ghosts existed (which they don't), they can't touch matter, for ghosts to eat tacos, they'd have to touch them somewhere, which they can't, so checkmate.
