|Command: linguistic expression of an instruction to act. The command has the form of a non-descriptive sentence. It can not be true or false.|
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Imperative/Indicative/Millikan: are not names of reproductively determined families, but rather categories of eigenfunction.
Command/Millikan: If it is not executed, it has no real value.
Definition real value/intentional icon/Millikan: the "of what" is an intentional icon; it is the real value.
R. G. Millikan
Language, Thought, and Other Biological Categories: New Foundations for Realism Cambridge 1987