2.9 Logical independence versus empirical correlation

The four axes are logically non-identical. That does not mean they must be statistically uncorrelated in Arthitean biology. Improving organization, practice, or processing may improve several axes together. Logical independence means only that one axis is not definitional shorthand for another.

Function does not definitionally imply Adeptness

Adeptness does not definitionally imply Usefulness

Usefulness does not definitionally imply Reliability

A specific biological rule may create causal correlations. For example, higher adeptness may often improve usefulness. But that is an empirical/biological dependency, not an identity.