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1 entry under unproven topic. ×

1
unsubstantiated(adjective, questionable)
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APASmart Define. (2015). hard to believe thesaurus. Retrieved October 2, 2026, from https://smartdefine.org/hard_to_believe/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard to believe thesaurus" https://smartdefine.org/hard_to_believe/thesaurus/synonyms (accessed October 2, 2026).
HarvardSmart Define 2015, hard to believe thesaurus, Smart Define, viewed 2 October, 2026, <https://smartdefine.org/hard_to_believe/thesaurus/synonyms>.
MLASmart Define. "hard to believe thesaurus" 14 April 2015. Web. 2 October 2026. <https://smartdefine.org/hard_to_believe/thesaurus/synonyms>