undecidable

 
Pronunciation: /ʌndɪˈsʌɪdəb(ə)l/

adjective

  • not able to be firmly established or refuted: the facts of Christ’s existence are ultimately undecidable
  • Logic (of a proposition or theorem) not able to be proved or disproved.

Derivatives

undecidability

Pronunciation: /-ˈbɪlɪti/
noun