Somewhat interestingly, the module of your brain that cooks up the image of an apple doesn’t know what an apple is either. It just knows what they look like. Many modules come together to produce what you consider an apple, then the interpreter module accepts their input and realizes it.

When you decide to draw this, commands are sent to the cerebellum to direct the hands to move your hands to make the realized image. Your cerebellum doesn’t understand what an apple is either, it’s just accepting input to draw specific shapes as directed by various parts of your brain that know how to draw. (And those parts don’t understand what an apple is either, they’re choosing what to draw based on the synaptic information of an apple).

No part of your brain knows what an apple is in isolation. Is easy to think of your brain as having a section for “apple” but it’s actually different parts of the brain keeping their own local records of what an apple is. Combining them creates what an apple is to that brain