Supposal

Sup`pos´al

n.

1.

The act of supposing; also, that which is supposed; supposition; opinion. Interest, with a Jew, never proceeds but upon supposal, at least, of a firm and sufficient bottom. - South.

Thesaurus

Noun	1.	supposal - a hypothesis that is taken for granted; "any society is built upon certain assumptions" assumption, supposition conclusion - an intuitive assumption; "jump to a conclusion" cornerstone, fundament, groundwork, basis, foundation, base - the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture" 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" given, presumption, precondition - an assumption that is taken for granted basic assumption, constatation, self-evident truth - an assumption that is basic to an argument
	2.	supposal - the cognitive process of supposing supposition conjecture - reasoning that involves the formation of conclusions from incomplete evidence presupposition - the act of presupposing; a supposition made prior to having knowledge (as for the purpose of argument)