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====== Disjunctive Facts and Superposition of States ====== [[http://marul.ffst.hr/~berislav|Berislav Žarnić]] \\ <fs 75%> //Faculty of Humanities and Social Sciences, University of Split//</fs> <blockquote>{{ :schrodinger_cat.png|}}**Abstract** Let us denote by `$\mathsf{descriptum}(p \sqcup q)$' the unobservable state of affairs described by the 'quantum disjunction' of basic physical propositions $p$ and $q$ describing mutually exclusive (`orthogonal') observable states. No such disjunctively composed state of affairs is allowed by //Tractarian// postulate of unique mode of composition of states of affairs. Quite the opposite holds true in the (orthodox interpretation of) quantum mechanics: it allows mutually exclusive states of affairs of the same object and the same magnitude to co-exist. If co-existence of orthogonal states is admitted, then a different kind of picture relation must be introduced to account for possibility of describing this kind of reality. A new logico-metaphysical situation appears when metaphysics allows for disjunctive composition of states of affairs and when logic accepts the possibility of linguistic representation of the disjunctive composition. </blockquote> {{amazon>en:9400793782 noprice =0}}