Among the selection criteria for the new polyurethane were that the material exhibited a combination of good wear characteristics and mechanical properties, was easy to handle, and provided for fast, easy alteration and repair of polyurethane as well as metal patterns.
A linguistic universal is a pattern that occurs systematically across natural languages, potentially true for all of them. For example, All languages have nouns and verbs, or If a language is spoken, it has consonants and vowels.
FG is thus a representative of the functionalist paradigm of linguistic research. The fundamental hypothesis of FG is that there is a largely non-arbitrary relation between the instrumentality of language use (hence Functional) and the systematicity of language structure (hence Grammar).