on/under/with the assumption

phrase

: as though one knows : in the belief

We are operating on/under/with the assumption that the loan will be approved.

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“On/under/with the assumption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%2Funder%2Fwith%20the%20assumption. Accessed 6 Mar. 2026.

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on/under/with the assumption

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