methodeutic

It is connected with what he called “speculative rhetoric” or “methodeutic”

Nobody Knows Nothing 2009

Thus, in his later writings, he divided semeiotic into speculative grammar, logical critic, and speculative rhetoric (also called “methodeutic”).

Nobody Knows Nothing 2009

The idea of methodeutic may overlap to some small extent with Morris's notion of “pragmatics,” but the spirit of Peirce's notion is much more extensive than that of Morris's notion.

Nobody Knows Nothing 2009

By “speculative rhetoric” or “methodeutic” Peirce understood all inquiry into the principles of the effective use of signs for producing valuable courses of research and giving valuable expositions.

Nobody Knows Nothing 2009