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: The constant assumption runs throughout the law that the natural and spontaneous evolutions of habit fix the limits of right and wrong.
Presumption
Part of speech: noun
Definition: the act of presuming, or something presumedthe belief of something based upon reasonable evidence, or upon something known to be truethe condition upon which something is presumedarrogant behaviour
Example sentence: It's a naive domestic Burgundy without any breeding, but I think you'll be amused by its presumption.