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Full Idea
In fuzzy logic, besides fuzzy predicates, which define fuzzy sets, there are also fuzzy quantifiers (such as 'most' and 'few') and fuzzy modifiers (such as 'usually').
Gist of Idea
There are fuzzy predicates (and sets), and fuzzy quantifiers and modifiers
Source
Stephen Read (Thinking About Logic [1995], Ch.7)
Book Ref
Read,Stephen: 'Thinking About Logic' [OUP 1995], p.189