An alternative schema

[Pa-miu]

A salad is a high entropy/homogeneous mixture of bite size solids maximizing ease of "forkability". I refuse to acknowledge the saladness of pizza.

[Graeme22]

Counterpoint: Occasionally lettuce leaves are too big to fit in a single bite. By your definition you can move from a non-salad to a salad simply by chopping a single lettuce leaf in half or removing it from the bowl.

[gmalmquist]

I often eat pizza with a knife and fork actually