Egan's law

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"It all adds up to normality."

Apples didn't stop falling when General Relativity supplanted Newtonian mechanics. The purpose of a theory is to add up to observed reality, rather than something else. Quantum mechanics is not some strange alternative universe, told as a story to delight us with its counterintuitiveness; quantum mechanics is where we have always lived. Science sets out to answer the question "What adds up to normality?" and the answer turns out to be "Quantum mechanics adds up to normality."

A weaker extension of this principle applies to ethical and metaethical debates, which generally ought to end up explaining why you shouldn't eat babies, rather than why you should.

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See also