hypothesis,
theory,
possibility a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena; "a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"
conclusion an intuitive assumption; "jump to a conclusion"
supposition -
The act or an instance of supposing.
OmegaWiki Dictionary
Ω
supposition That which one holds to be true; the acceptance of a fact, opinion, or assertion as real or true despite a lack of strong evidence or knowledge.
supposition The act of taking for granted, or accepting a thing without proof.