(1) Mind is an aggregate of interacting parts or components.
(2) The interaction between parts of mind is triggered by difference.
(3) Mental process requires collateral energy.
(4) Mental process requires circular (or more complex) chains of determination.
(5) In mental process the effects of difference are to be regarded as transforms (i.e., coded versions) of the difference which preceded them.
Air pressure differences ==> Fluid Pressure Diffs ==> Cilia root pressure diffs ==> Neuronal State differences ==> etc.
(6) The description and classification of these processes of transformation discloses a hierarchy of logical types immanent in the phenomena.
Logical Hierarchies vs Emergent Hierarchies?
I shall argue that the phenomena which we call thought, evolution, ecology, life, learning occur only in systems that satisfy these criteria.
(Bateson, 1979, pp. 85, 86)