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Up here, most questions are fundamentally unprovable, and uncertainty reigns.—Gregory Barber, Quanta Magazine, 20 June 2025 But skeptics say that without the original document, the story is unprovable.—Virginia Brown, Charlotte Observer, 14 May 2025 One fear is therefore that the Collatz problem is one of the unprovable statements of mathematics.—Manon Bischoff, Scientific American, 25 July 2024 Greenwashing involves unfounded or unprovable claims of environmental sustainability.—Marisa Garcia, Forbes, 16 Aug. 2024 See All Example Sentences for unprovable
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