Abstract

The paper addresses the concept of useful fiction in texts authored by the fourteenth-century nominalists Henry Harclay, William Ockham, John Buridan and Nicholas Oresme. Three fundamental ideas related to fictionalism will be documented. First, the view that statements about fictions are covert conditionals with impossible antecedents. Second, the view that the primary concern with fictions is their practical utility, i.e., applicability in the context of a scientific discipline. Third, the view that it is useful to pretend that fictions of a certain kind can be used uniformly to represent physical reality, such that a natural phenomenon A is pretended to be a B, where Bs themselves are only pretended to be real.