Charles Sanders Pierce (1839-1914). Founder of American pragmatism.

Relation to Sellars, habits, and rules

For Sellars, the word ‘habit’ denotes a mere regularity. For Pierce, habit is a normative concept.

He observes that the Latin form in which Newton lies down in Principia is the same form a notice board that says “Neckties will be worn in the office”.

Sellars would call this notion of normativity “ought-to-be”.

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