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Propositional Quantum Mechanics

Quantum mechanics is reformulated using Hartle's definition of the state of an individual physical system and a variant of von Neumann's propositional calculus. An elementary set of quantum postulates lead inductively to the familiar formulas of quantum theory, including the canonical commutation relation and Schr\"odinger's equation. The expected value of the frequency of events for an ideal ensemble is equal to the expected value of a state operator for an individual system, producing a binomial probability distribution for the determination of indefinite experimental propositions.