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.
Cite this Entry
“On the supposition that.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20the%20supposition%20that. Accessed 13 Mar. 2026.
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