un·​prov·​able ˌən-ˈprü-və-bəl How to pronounce unprovable (audio)
: unable to be proved : not provable
an unprovable theory
unprovably adverb

Example Sentences

Recent Examples on the Web The problem with this entire discussion—including the experts’ breezy dismissals—is that the presence or absence of sentience is by definition unprovable, unfalsifiable, unknowable. Rob Toews, Forbes, 24 July 2022 By the early 1900s, so many barnacles had clung to the keel of mathematics—so many paradoxes, and theories that were true but unprovable, and strange new geometries—that the vessel itself seemed in danger of sinking. Samanth Subramanian, The New Republic, 8 Mar. 2022 Gödel’s First Incompleteness Theorem says that, in any proof language, there are always unprovable statements. Dave Linkletter, Popular Mechanics, 28 Jan. 2022 Think through every case to see why this is an example of a true, but unprovable statement. Dave Linkletter, Popular Mechanics, 28 Jan. 2022 Euclid’s geometry, the epitome of logical reasoning, is based on no fewer than 33 axiomatic, unprovable articles of faith. Michael Guillen, WSJ, 23 Sep. 2021 Not if the last word comes from the U.S. intelligence community, which reported to the White House this week that China’s fault is plausible but unprovable. Mike Pompeo And David B. Rivkin Jr., WSJ, 26 Aug. 2021 Civil-rights organizations and scholars of religion have strenuously objected to using an unproven—and unprovable—hypothesis to discredit the self-determination of competent adults. Zoë Heller, The New Yorker, 5 July 2021 In 2013 Conway returned to the problem with probabilistic arguments suggesting that the Collatz conjecture itself is unprovable with the axiom systems that are usually used in mathematics. Jean-paul Delahaye, Scientific American, 28 Apr. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unprovable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of unprovable was in the 14th century

Dictionary Entries Near unprovable

Cite this Entry

“Unprovable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unprovable. Accessed 8 Dec. 2022.

Legal Definition


: not provable

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