I enjoy this kind of thing. I definitely take objection to their entropy argument though. A cheeseburger with like 5 ingredients stacked into layers is not in the same entropy universe as a salad with hundreds of little leaves and chunks of food in a big pile. Criticizing the cube model on the basis that eating the food can change the category seems a little silly when even they would admit that a salad eaten down to just a singular crouton is no longer a salad.