on the supposition that

phrase

: based on the belief without actual proof that (something is so) : based on the assumption that (something is so)
Her decision was made on the supposition that we would all agree.

Examples of on the supposition that in a Sentence

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McCarthy brought some friends back to the town presumably on the supposition that the magic could be revived. — John Tamny, Forbes, 20 May 2021 The QAnon theory rests on the supposition that a government agent with top-secret Q-level security clearance has been posting cryptic messages on online bulletin boards that hint at happenings going on behind the scenes. — Richard Ruelas, The Arizona Republic, 9 Oct. 2020 Barometer's second-round surveys now ask respondents to name the date of the general election, on the supposition that anyone who can likely plans to cast a ballot. — Arielle Pardes, Wired, 15 Sep. 2020

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“On the supposition that.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20the%20supposition%20that. Accessed 28 Sep. 2026.

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