The adaptive toolbox has three layers

The adaptive toolbox has three layers: evolved capacities, building blocks that make use of capacities, and rules of thumb composed of building blocks. The relationship be tween these three layers can be compared to that between the atomic particles, the chemical elements in the periodic table, and the molecules built from combinations of the elements. There are many molecules and rules of thumb, fewer elements and building blocks, and even fewer particles and capacities.

— from Expanding Your Range (Growth/Change/Education/Learning/Habit) · Gut Feelings: The Intelligence of the Unconscious by Gerd Gigerenzer

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