The act of taking to or upon oneself: assumption of an obligation.
The act of taking possession or asserting a claim: assumption of command.
The act of taking for granted: assumption of a false theory.
Something taken for granted or accepted as true without proof; a supposition: a valid assumption.
Presumption; arrogance.
Logic. A minor premise.
There is some proof and circumstantial evidence to backup Teasy's ASSumption... but when people start arguing over one word they really do need to consider getting a life...