Assertion and Supposition

Assertion

Assertion noun - An idea or opinion that is put forth in a discussion or debate.
Usage example: made the unlikely assertion that gravity affects light

Supposition and assertion are semantically related. In some cases you can use "Supposition" instead a noun "Assertion".

Supposition

Supposition noun - Something taken as being true or factual and used as a starting point for a course of action or reasoning.
Usage example: worthless genetic research that was based on the erroneous supposition that acquired characteristics can be passed on to offspring

Assertion and supposition are semantically related. Sometimes you can use "Assertion" instead a noun "Supposition".

How words are described

common common assertion common supposition
earlier earlier assertion earlier supposition
Cite this Source
Supposition and Assertion. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/assertion/supposition
Assertion & Supposition. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/assertion/supposition>.
Supposition or Assertion. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/assertion/supposition.
Google Ngram Viewer shows how "assertion" and "supposition" have occurred on timeline