The logic of propositions which are not simultaneously decidable

E. P. Specker

pp. 135-140

in: Clifford A. Hooker (ed), The logico-algebraic approach to quantum mechanics I, Berlin, Springer, 1975

Abstract

The prefacing motto of this essay is the subtitle of the chapter "La physique de l"objet quelconque" from the work Les Mathématiques et la Réalité. This physics shows itself essentially to be a form of classical propositional logic, which on the one hand receives a typical interpretation, and which on the other hand divests itself in an almost obvious manner of the claim to absoluteness with which it was occasionally associated The following paper associates itself with this point of view and should be understood in the same empirical sense.