Movement Over Judgement

Definition

Normal thinking judges an idea against past experience — does it fit what we already know — and this "backward effect" is essential for most reasoning, but it kills genuinely new ideas by testing them against exactly the patterns they are meant to break. Green hat thinking substitutes "movement": using an idea not to assess whether it is correct but to see where it leads, the way a stepping stone is used to cross a river rather than judged on its own merits. De Bono insists movement is an active idiom, not merely suspended judgment — it tells the thinker what to do, not just what to withhold.

In the Book

De Bono traces green hat thinking to his own concept of lateral thinking (a term he coined in 1967, now in the Oxford English Dictionary), which he describes technically as pattern-switching in a self-organizing, asymmetric information system — and notes the underlying mechanism is shared with humour, both depending on a sudden jump across established patterns that then makes sense in hindsight (the "eureka effect"). He argues earlier creativity approaches that spoke of "deferring" or "suspending" judgement were too weak because they only said what not to do; movement replaces that gap with an instruction to actively use an idea for its forward effect. His concrete example is a deliberate provocation — "suppose everyone became a policeman" — used for its movement value rather than assessed for realism, which led directly to the concept of neighbourhood watch, a program he introduced in a 1971 New York Magazine cover story that was, by the time of writing, in use in twenty thousand US communities with a reported significant fall in local crime.

Why It Matters

Any idea that violates current experience will fail an immediate fit-test, which means judgment-first evaluation systematically filters out the ideas most likely to be genuinely new — they look wrong precisely because they don't match what's already known. Movement offers an alternative discipline: hold the "wrong" idea deliberately, ask only what it leads to, and let the destination be judged instead of the provocation itself. This separates the moment of generation from the moment of evaluation cleanly enough that a proposal nobody would approve on its face (an unrealistic "what if everyone were a policeman") can still be mined for a workable, unrelated insight it points toward.