单词	undecidable
释义	undecidable /ʌndɪˈsʌɪdəb(ə)l / adjective 1Not able to be firmly established or refuted: the facts of Christ’s existence are ultimately undecidable 1.1 Logic (Of a proposition or theorem) not able to be proved or disproved.All we could achieve by our mathematics would be non-constructive existence proofs that told us that they existed, in much the same manner that we can deduce the existence of undecidable propositions.... Godel showed that in any formal system adequate for number theory there is an undecidable formula, that is, a formula such that neither it nor its negation can be proved. In Undecidable theories Tarski showed that group theory, lattices, abstract projective geometry, closure algebras and others mathematical systems are undecidable. Derivatives undecidability /ʌndɪsʌɪdəˈbɪlɪti/ noun ... Such an attempt quickly presents the problem of undecidability, an interesting principle with wide-ranging implications. But, in the haze and visual undecidability of Lyons' St Albans facades, perhaps some remnants of both these lost ideals also hover. Such concepts point to the undecidability of affect, its existence in the self and the other, the film and the theorist.
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