# Principle of distributivity

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The principle of distributivity states that the algebraic distributive law is valid for classical logic, where both logical conjunction and logical disjunction are distributive over each other. The principle is valid in classical logic, but invalid in quantum logic.

The article Is logic empirical? discusses the case that quantum logic is the correct logic, on the grounds that the principle of distributivity is inconsistent with a reasonable interpretation of quantum phenomena.

For some logical propositions A, B and C, the principle of distributivity means that

$A \land (B \lor C) \equiv (A \land B) \lor (A \land C).$