on/under/with the assumption
idiom
: as though one knows : in the belief
We are operating on/under/with the assumption that the loan will be approved.
Examples of on/under/with the assumption in a Sentence
Recent Examples on the Web
Right now, power companies are betting big on new sources of electricity generation on the assumption that AI will continue driving demand growth.
—
Justin Worland, Time, 22 Aug. 2025
As a result, Zandi cautioned against making other tax and spending decisions based on the assumption those tariffs will remain in place.
—Eleanor Pringle, Fortune, 11 Aug. 2025
Both are also operating on the assumption that pro-Israel groups, which in 2022 helped Stevens beat a Democrat with more critical views of the Israeli government, will help her again.
—David Weigel, semafor.com, 6 Aug. 2025
Sometimes, countries may have operated on the assumption that owning a satellite would give them the appearance of soft or hard geopolitical power as a space nation – and ultimately gain relevance.
—Tony Milligan, Space.com, 3 Aug. 2025
Stocks like UnitedHealth were priced on the assumption that growth would stay steady, margins wouldn’t come under pressure, and regulators would remain passive.
—Jim Osman, Forbes.com, 3 Aug. 2025
The challenge: translating policy to the classroom Pondiscio said at the forum that education reform has focused too much on the assumption that schools and teachers already know what to do and only need to be held accountable for their work.
—Alec Johnson, jsonline.com, 30 July 2025
Still, many facility owners operate under the assumption that passing these baseline inspections is sufficient.
—Daniel Fusch, USA Today, 17 July 2025
This was done with the assumption that on top of whatever caused the ulcer, there was now also a potentially aggressive secondary infection—one not knocked out by the previous round of antibiotics the man had been given.
—ArsTechnica, 3 July 2025
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Justin Worland, Time, 22 Aug. 2025
As a result, Zandi cautioned against making other tax and spending decisions based on the assumption those tariffs will remain in place.
—Eleanor Pringle, Fortune, 11 Aug. 2025
Both are also operating on the assumption that pro-Israel groups, which in 2022 helped Stevens beat a Democrat with more critical views of the Israeli government, will help her again.
—David Weigel, semafor.com, 6 Aug. 2025
Sometimes, countries may have operated on the assumption that owning a satellite would give them the appearance of soft or hard geopolitical power as a space nation – and ultimately gain relevance.
—Tony Milligan, Space.com, 3 Aug. 2025
Stocks like UnitedHealth were priced on the assumption that growth would stay steady, margins wouldn’t come under pressure, and regulators would remain passive.
—Jim Osman, Forbes.com, 3 Aug. 2025
The challenge: translating policy to the classroom Pondiscio said at the forum that education reform has focused too much on the assumption that schools and teachers already know what to do and only need to be held accountable for their work.
—Alec Johnson, jsonline.com, 30 July 2025
Still, many facility owners operate under the assumption that passing these baseline inspections is sufficient.
—Daniel Fusch, USA Today, 17 July 2025
This was done with the assumption that on top of whatever caused the ulcer, there was now also a potentially aggressive secondary infection—one not knocked out by the previous round of antibiotics the man had been given.
—ArsTechnica, 3 July 2025
Cite this Entry
“On/under/with the assumption.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%2Funder%2Fwith%20the%20assumption. Accessed 5 Feb. 2026.
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