Cognitive Flexibility Theory

Some knowledge is like a key: one shape, one door. Other knowledge must open doors that change shape. This theory concerns the second kind — and the failure of teaching the first way when the second is needed.

Watch the difference. A formula memorized once serves the exam. But medicine, management, parenting, cooking from an almost-empty fridge — these are irregular lands. The same rule applied the same way twice can be right once and ruinous once.

So the theory prescribes: learn the important things from several directions, in several settings, through several cases. Not repetition — revisitation. Each pass shows you a different contour of the same territory, until you hold not a rule but a map.

When you truly need a skill, ask yourself: can I do this only in the conditions where I learned it? If yes, you own a key. Go back and earn the map.