Combinatory play — Einstein's phrase for it — was not a metaphor. He literally meant the deliberate mixing of different mental materials, the way a child combines blocks without caring whether the result is 'correct.' What's interesting is that the philosopher Alfred North Whitehead arrived at almost the same idea from a completely different direction: in *Process and Reality* (1929), he argued that creativity is never the production of something from nothing, but always the novel synthesis of already-existing actualities into a pattern that didn't previously exist. The implication for problem-solving is subtle but precise — the raw materials of your best insight are almost certainly already in your possession. What's missing isn't more input. It's the willingness to treat your existing knowledge as combinable across categories that feel incompatible. The practical move: when you're stuck, don't reach for more research or more options. Lay out what you already know from two or three completely different domains touching your problem, and ask what they share structurally — not thematically, but structurally. The answer almost always surprises.

When did you last deliberately place two pieces of knowledge from completely different domains side by side and look for structural similarity rather than surface similarity?

Drawing from Process Philosophy — Alfred North Whitehead (Process and Reality, 1929)