This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. An assumption made beforehand; a preliminary conjecture or speculation.

n. The act of presupposing.

n. The act of presupposing; an antecedent implication; presumption.

n. That which is presupposed; a previous supposition or surmise.

n. Supposition in advance of experience or knowledge; surmise; conjecture.

n. Postulation as of an antecedent condition; hence, that which is postulated as a necessary antecedent condition; a prerequisite.

n. the act of presupposing; a supposition made prior to having knowledge (as for the purpose of argument)

"Your presupposition is that our government needs to maintain its current level of spending, or will increase spending, which, while entirely likely, will dip again at some point, the nature of the economy being slightly cyclical."

supposition    supposal   

presumption    assumption    conjecture   

Deposition    Inquisition    Prohibition    Titian    abolition   

postulate    underpin    preconception    generalization    prepossession