I find it even more bonkers than that, even. Let's "frictionless vacuum" the problem: I live in a home in which all we eat is breakfast cereal. We need one spoon and one bowl per meal per person. But we own 25 bowls and 40 spoons. When we run out of bowls (that is, when the "dirty" dishwasher is running with a complement of 25 bowls), the "clean" dishwasher still contains 15 spoons. At the next mealtime, we each get a spoon and a bowl. When we're done eating, we put the dirty dishes in… Well, not either of the "clean" dishwashers!

It becomes absurd faster when you consider what a realistic household would own and eat and use. "There's no unloading necessary," he says. Absolutely ridiculous.