Reason   

Reason

Commens
Digital Companion to C. S. Peirce
Reason
1902 | Paulsen's Kant | CN 3:95

In the best philosophical use of English words, “reasoning” is a well-known operation of a mind, and “reasoning power” (or, less well, “reason”) is the faculty of performing it. “The Reason” is a totally distinct faculty by which we are supposed to know the truth of first principles. “Reason” means nothing more nor less than conformity to the best result of deliberation.