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.
Generative linguistics is a school of thought within linguistics that makes use of the concept of a generative grammar.The term 'generative' is a concept borrowed from mathematics, indicating a set of definitions rather than a system that creates something.n the 'Standard Theory', a generative grammar is formally defined as one that is fully explicit. It is a finite set of rules that can be applied to generate exactly those sentences (often, but not necessarily, infinite in number) that are grammatical in a given language, and no others.