The assumption that a certain thing is true, and which gives to a person or thing, a quality which is not natural to it, and establishes, consequently, a certain disposition, which, without the fiction, would be repugnant to reason and to truth. It is an order of things which does not exist, but which the law prescribe; or authorizes it differs from presumption, because it establishes as true, something which is false; whereas presumption supplies the proof of something true.