Legal fiction
A legal fiction is a construct used in the law where a thing is taken to be true, which is not in fact true, in order to achieve an outcome. Legal fictions can be employed by the courts or found in legislation.
Legal fictions are different from legal presumptions which assume a certain state of facts until the opposite is proved, such as the presumption of legitimacy.
The term legal fiction is sometimes used in a pejorative way. Jeremy Bentham was a famous historical critic of legal fictions. Proponents of legal fictions, particularly of their use historically, identify legal fictions as "scaffolding around a building under construction".