quarks, etc. as tables. Recognizing faces as attractive, like recognizing certain arrangements of leptons, quarks, etc. as tables, is simply something that one does, or is able to do. It is, therefore, an instance of procedural knowledge, but it is not an instance of know-how. In many cases, both forms of knowledge are subconscious.

For instance, research by cognitive psychologist Pawel Lewicki has shown that procedural knowledge can be acquired by subconscious processing