  Buridan sees that it is misleading to assign a special logical sense to terms being used to refer to themselves or to the concepts they express, as if this were any different from figurative or metaphorical usage, since only terms that refer to things existing per se are being used in their proper sense. Thus, terms can stand either for the things they ordinarily signify, in which case they supposit personally, or for something else, in which case they supposit materially. Material supposition applies whenever a term is used in some way that departs from the meaning imposed upon it by the linguistic community: