Indeterminacy, complementarity, noncausality are not modes of being in the physical world, but systems for describing it in a convenient way.
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The Role of the Reader : Explorations in the Semiotics of Texts (1979), Part 1: Open, Ch. 1 : The Poetics of the Open Work, endnote 9, p. 66; later published amidst extended and developed translations of Opera aperta (1962), in The Open Work (1989) as translated by Anna Cancogni, Ch. 1 : The Poetics of the Open Work, endnote 9, p. 251