Formal Logic
Keyword: Formal Logic
Dictionary Entry  Posted 11/08/2017 Quote from "Material Logic" Formal logic classifies arguments by producing forms in which, the letters of the alphabet being replaced by any terms whatever, the result will be a valid, probable, or sophistic argument, as the... 

Dictionary Entry  Posted 04/05/2015 Quote from "Philosophy in the Light of the Logic of Relatives" Formal logic is mathematics; it is the most abstract branch of mathematics. But no other logic is called for in pure mathematics. 

Dictionary Entry  Posted 04/05/2015 Quote from "Minute Logic: Chapter III. The Simplest Mathematics" Mathematical logic is formal logic. Formal logic, however developed, is mathematics. Formal logic, however, is by no means the whole of logic, or even its principal part. It is hardly to be... 

Manuscript  Posted 04/05/2015 Peirce, Charles S. (nd). Philosophy in the Light of the Logic of Relatives. MS [R] 1336 Robin Catalogue: 