Misassumption

[uh-suhmp-shuh n] /əˈsʌmp ʃən/

noun
1.
something taken for granted; a supposition:
a correct assumption.
Synonyms: presupposition; hypothesis, conjecture, guess, postulate, theory.
2.
the act of taking for granted or supposing.
Synonyms: presumption; presupposition.
3.
the act of taking to or upon oneself.
Synonyms: acceptance, shouldering.
4.
the act of taking possession of something:
the assumption of power.
Synonyms: seizure, appropriation, usurpation, arrogation.
5.
arrogance; presumption.
Synonyms: presumptuousness; effrontery, forwardness, gall.
6.
the taking over of another’s debts or obligations.
7.
Ecclesiastical.

8.
Logic. the minor premise of a .
/əˈsʌmpʃən/
noun
1.
the act of taking something for granted or something that is taken for granted
2.
an assuming of power or possession of something
3.
arrogance; presumption
4.
(logic) a statement that is used as the premise of a particular argument but may not be otherwise accepted Compare axiom (sense 4)
/əˈsʌmpʃən/
noun (Christianity)
1.
the taking up of the Virgin Mary (body and soul) into heaven when her earthly life was ended
2.
the feast commemorating this, celebrated by Roman Catholics on Aug 15
n.

c.1300, “the reception, uncorrupted, of the Virgin Mary into Heaven,” also the Church festival (Aug. 15) commemorating this, Feast of the Assumption, from Old French assumpcion and directly from Latin assumptionem (nominative assumptio) “a taking, receiving,” noun of action from past participle stem of assumere (see assume). Meaning “minor premise of a syllogism” is late 14c. Meaning “appropriation of a right or possession” is mid-15c. Meaning “action of taking for oneself” is recorded from 1580s; that of “something taken for granted” is from 1620s.