A supposition is an assumption or a belief that something is true, even though there may not be any concrete evidence to support it. It's a hypothetical idea or conjecture based on limited information or reasoning.
Usage examples
The detective made a supposition about the suspect's whereabouts based on their previous patterns of behavior.
The scientist presented a strong supposition that the new drug would effectively treat the disease, but further testing was needed to confirm it.
It is merely a supposition that the stock market will crash next year; there is no concrete evidence supporting this claim.
The student's supposition that studying for a longer period would improve their test scores turned out to be correct.
The author's novel is built on the supposition that humans will one day colonize Mars and explores the challenges they might face.
While we invest in where a company's going, not where it's been, it's also important to look at what a company has done over the long term, as that allows an investor to build a foundation of supposition about a company's trajectory. (dailytradealert.com)
KJMaines — There are an awful lot of suppositions in your comment. (religion.blogs.cnn.com)
Because few breeds developed out of whole cloth and most breeds were produced in relative isolation by experimenting with crosses, back - crosses, and out - crosses, breed histories are replete with suppositions and speculations. (canismajor.com)