Premise
Part of speech: verb
Definition: To state or assume something as a proposition to an argument To make a premise
Part of speech: noun
Definition: A proposition antecedently supposed or proved; something previously stated or assumed as the basis of further argument; a condition; a supposition. Either of the first two propositions of a syllogism, from which the conclusion is deduced. Matters previously stated or set forth; esp., that part in the beginning of a deed, the office of which is to express the grantor and grantee, and the land or thing granted or conveyed, and all that precedes the habendum; the thing demised or granted. A piece of real estate; a building and its adjuncts (in this sense, used most often in the plural form).
Example sentence: Tonight, we gather to affirm the greatness of our nation - not because of the height of our skyscrapers, or the power of our military, or the size of our economy. Our pride is based on a very simple premise, summed up in a declaration made over two hundred years ago.
Assumption
Part of speech: noun
Definition: The act of assuming, or taking to or upon one's self; the act of taking up or adopting.The act of taking for granted, or supposing a thing without proof; a supposition; an unwarrantable claim.The thing supposed; a postulate, or proposition assumed; a supposition.The minor or second proposition in a categorical syllogism.The taking of a person up into heaven.A festival in honor of the ascent of the Virgin Mary into heaven.
Example sentence: People take things at face value on social media. Earnestness is the assumption.