The extension is the perceptual manifestation of the concept.

It is:

– the visible form
– the material structure
– the spacetime appearance
– the physical behavior

Extension is not the concept itself. It is the shadow cast by the concept when invoked inside spacetime. In my protological theory, the concept of concept is part of the extension of every concept, and the extension of every concept implies and contains every other concept, the entire universe.

Matter is extension. Bodies are extensions. Universes are extension.

Extension is the outer surface of intension. The extension grows and transcends into body of reasoning and into a material body.