Axiom   

Axiom

Commens
Digital Companion to C. S. Peirce
Axiom
1904 | Sketch of Dichotomic Mathematics | NEM 4:287

Any Axiom would be a proposition not deducible from anything asserted in the definitions and postulates, but immediately evident in view of the facts that have been laid down and these are true.

1904 [c.] | New Elements (Kaina stoiceia) | EP 2:302

An axiom is a self-evident truth, the statement of which is superfluous to the conclusiveness of the reasoning, and which only serves to show a principle involved in the reasoning. It is generally a truth of observation; such as the assertion that something is true.