Type-token

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I philosophy and other disciplines, the type–token distinction is the difference between naming a class (type) of objects and naming the individual instances (tokens) of that class. Since each type may be exemplified by multiple tokens, there are generally more tokens than types of an object. For example, the sentence "A rose is a rose is a rose" contains three word types: three word tokens of the type a, three word tokens of the type rose, and two word tokens of the type is. The distinction is important in disciplines such as philosophy, logic, linguistics, metalogic, metaphysics, typography, and various sciences.