undecidable

/ˌʌndɪˈsaɪdəbəl/
adjective
  1. Impossible to decide or settle; not able to be determined or resolved.
    • The question of which painting is better is undecidable because taste is subjective.
    • In mathematics, some statements are undecidable within a given set of axioms.
    • The jury found the case undecidable and declared a mistrial.
Antonyms
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