ABSTRACT
This chapter examines the projected outlines of a scientific language E, attending to structural elements of such a language which have been widely discussed in recent years. It provides those likely features of E that seem relatively trouble-free. The chapter considers general problems faced by all concerned with the construction of E. One such problem relates to what have been called 'disposition terms', seemingly required for any suitable E, though considered not generally definable by its observational vocabulary. The chapter presents a rough account of observational predicates by reference to observation of elements. It suggests that observationality be construed as a requirement on primitive extra-logical terms of E. Non-observational terms will thus be admissible if definable by means of the observational primitives. Having imposed a requirement of observationality on the primitive extra-logical vocabulary of E, we can ensure that the ontology of E will include observable elements.
