Different levels of concept-space

Concept-space has different degrees of granularity.

The concept for a “hand” (higher level) is separate from the concept of the “fingers” and “palm” (lower level), but they are distinctly tied together. The lower level concepts cannot are greater detail on the higher level concept, not separate concepts at the same level.^[ Rationality, From A to Z#^5db241]

This is similar to the idea behind Layers of abstraction