 Some logicians seem to identify the schema with the template alone. (Tarski’s wording at 1933/1983: 155–6 suggests this identification, while Church’s at 1956: 149 seems calculated to avoid it.) But one and the same schema-template may be a component of any number of different schemata depending on the side condition or the underlying language. Furthermore, since different characters or strings can be used as placeholders (see above) and since even one notational change produces a different syntactic string in the strict sense (Corcoran et al. 1974), one and the same set of instances may be determined by different schema-template/side-condition pairings even given a fixed language. It may be this fact that leads some authors to write as though the schema is to be identified with the set of instances. For many purposes it is the set of specified instances that is of primary importance and the question of exactly what is involved in specifying it is considered a mere technicality.