“Insanity is doing the same thing over and over and expecting different results.”

That witticism — I’ll call it “Einstein Insanity” — is usually attributed to Albert Einstein. Though the Matthew effect may be operating here, it is undeniably the sort of clever, memorable one-liner that Einstein often tossed off. And I’m happy to give him the credit, because doing so takes us in interesting directions.

First of all, note that what Einstein describes as insanity is, according to quantum theory, the way the world actually works. In quantum mechanics you can do the same thing many times and get different results. Indeed, that is the premise underlying great high-energy particle colliders. In those colliders, physicists bash together the same particles in precisely the same way, trillions upon trillions of times. Are they all insane to do so? It would seem they are not, since they have garnered a stupendous variety of results.

Of course Einstein, famously, did not believe in the inherent unpredictability of the world, saying “God does not play dice.” Yet in playing dice, we act out Einstein Insanity: We do the same thing over and over — namely, roll the dice — and we correctly anticipate different results. Is it really insane to play dice? If so, it’s a very common form of madness!

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