conjecture
Definitions
An opinion or conclusion formed on the basis of incomplete information.
A proposition that is unproven but conjectured to be true.
Examples
The scientist's theory remains a mere conjecture until further evidence can be gathered.
It is difficult to prove his conjecture because there is so little historical data available.
She dismissed his wild conjecture as nothing more than idle gossip.
Synonyms
speculation guess surmise supposition hypothesis assumption inference