Normative science rests largely on phenomenology and on mathematics;
metaphysics on phenomenology and on normative science.

❧ Charles Sanders Peirce • Collected Papers, CP 1.186 (1903)
Syllabus • Classification of Sciences (CP 1.180–202, G-1903-2b)

Re: Peirce List • John Sowa

JS:

Questions for everybody to consider:  In the 1903 classification of the sciences, Peirce did not mention semeiotic, the most important science that he introduced.  Why not?  Where does it belong in the classification?

The short schrift on this subject may be summed up in the following syllogism.

• Logic = Formal Semiotic
• C.S. Peirce • On the Definition of Logic

• Formal = Quasi-Necessary = Normative
• C.S. Peirce • Logic as Semiotic
  It’s a peculiar use, but it’s Peirce’s peculiar use in this context.

• Conclusion.  Logic = Normative Semiotic.
• C.S. Peirce • Objective Logic

• Corollary.  This leaves room for Descriptive Semiotic.

Additional Notes

• Definition and Determination • (4) • (5)

cc: Category Theory • Cybernetics (1) (2) • Structural Modeling • Systems Science
cc: FB | Semeiotics • Laws of Form • Ontolog Forum • Peirce List (1) (2) (3) (4) (5)