PRESUMPTION

noun Etymology: Middle English presumpcioun, from Anglo-French ~, from Late Latin & Latin; Late Latin praesumption-, praesumptio presumptuous attitude, from Latin, assumption, from praesumere Date: 13th century presumptuous attitude or conduct ; audacity , 2. an attitude or belief dictated by probability ; assumption , the ground, reason, or evidence lending probability to a belief, a legal inference as to the existence or truth of a fact not certainly known that is drawn from the known or proved existence of some other fact