👉 In logic and mathematics, a "sylid" is a type of predicate that can be used to express the existence or non-existence of an element. Syllables are a fundamental part of the syntax of formal languages. For example, in the language of predicate logic, a syntactic symbol (e.g., "if") can be used as a predicate with one or more arguments, each of which must be true or false to express its meaning. The set of all such symbols is known