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.
The way a particular language expresses volition, or control, in a sentence is not universal. Neither is any given linguist's approach to volition. Linguists may take a primarily semantic or primarily syntactic approach to understanding volition.