Keyword: Logic

Dictionary Entry | Posted 24/08/2017
Quote from "On Existential Graphs as an Instrument of Logical Research"

…the very kernel of logic consists in the investigation of the validity of arguments, which depend upon their necessary conformity (whether perfect or not) to real facts. Now thinking one way or...

Manuscript | Posted 24/08/2017
Peirce, Charles S. (1906 [c.]). On Existential Graphs as an Instrument of Logical Research. MS [R] 498

Robin Catalogue:
A. MS., notebook (Harvard Cooperative), n.p., n.d.
Evidently prepared as an address to the American Academy. CSP mentions that existential graphs were...

Article in Journal | Posted 17/08/2017
Howat, Andrew (2014). Peirce on Grounding the Laws of Logic
This paper is a contribution to the long-standing debate over the coherence of Charles Sanders Peirce's overall system of philosophy. It approaches that issue through the lens of a contemporary...
Article in Journal | Posted 17/08/2017
Bellucci, Francesco (2014). “Logic, considered as Semeiotic”: On Peirce's Philosophy of Logic
In his later years, Peirce devoted much energy to the project of a book on logic, whose intended title was “Logic, considered as Semeiotic.” That the science of logic is better considered as...
Article in Journal | Posted 17/08/2017
Tiercelin, Claudine (2017). “Was Peirce a Genuine Anti-Psychologist in Logic?”
The aim of the paper is to try and make one’s ideas clearer about such concepts as “logic,” “psychology,” “mind,” “normativity,” rationality,” as they were conceived by Peirce, in order to elucidate...
Dictionary Entry | Posted 09/08/2017
Quote from "The Logic Notebook"

logic is merely the science of ideas considered as signs.

News | Posted 10/07/2017
Cognitio: Revista de Filosofia v. 18 n.1, 2017

Published by the Center for Studies in Pragmatism, under the Program of Post-Graduate Studies in Philosophy of the Pontifical Catholic University of São Paulo (PUC-SP), Cognitio is a philosophy...

Article in Journal | Posted 13/03/2017
Lane, Robert (1999). Peirce's Triadic Logic Revisited
Discusses the views of philosopher Charles Peirce on a three-valued system of formal logic. Details on the triadic experiments of Peirce; Details of Peirce's triadic logic; Claims of Peirce...
Encyclopedia Article | Posted 30/11/2016
Bellucci, Francesco: "The Sign of Consequence"

The “sign of consequence” is a notation for propositional logic that Peirce invented in 1886 and used at least until 1894. It substituted the “copula of inclusion” which he had been using since ...

Dictionary Entry | Posted 07/08/2016
Quote from "Reason's Conscience: A Practical Treatise on the Theory of Discovery; Wherein logic is conceived as Semeiotic"

Logic is that branch of normative science which studies the conditions of truth, or that kind of excellence which may or may not belong to objects...

Article in Journal | Posted 13/02/2016
De Waal, Cornelis (2005). Why Metaphysics Needs Logic and Mathematics Doesn't: Mathematics, Logic, and Metaphysics in Peirce's Classification of the Sciences
Discusses the difference between mathematics and metaphysics regarding their relation to logic. Examination of Auguste Comte's classification of sciences; Comparison of Comte's...
Monograph | Posted 19/01/2016
Haas, William P. (1964). The Conception of Law and the Unity of Peirce's Philosophy
Article in Journal | Posted 21/12/2015
Brunning, Jacqueline (1983). A Brief Account of Peirce's Development of the Algrebra of Relations
Monograph | Posted 18/12/2015
Martin, R. M. (1979). Peirce's Logic of Relations and Other Studies
Dictionary Entry | Posted 28/11/2015
Quote from "Chap. XI. On Logical Breadth and Depth"

Logic is the study of the laws of signs so far as these denote things – those laws of signs which determine what things they denote and what they do not…

Dictionary Entry | Posted 25/11/2015
Quote from "Preface"

…it would seem proper that in the present state of knowledge logic should be regarded as coëxtensive with General Semeiotic, the a priori theory of signs....

Dictionary Entry | Posted 19/11/2015
Quote from "On Signs [R]"

Logic, in its general sense, is, as I believe I have shown, only another name for semiotic (σημειωτική), the quasi-necessary, or formal, doctrine of signs...

Dictionary Entry | Posted 16/11/2015
Quote from "New Elements (Kaina stoiceia)"

Logic, for me, is the study of the essential conditions to which signs must conform in order to function as such. How the constitution of the human mind may compel...

Dictionary Entry | Posted 23/10/2015
Quote from "The Basis of Pragmaticism"

Logic is no doubt a science of “thought”; but “thought,” in that sense, is no more internal than it is external. Logic is the science of truth and falsity. But truth and falsity belong as much to...

Dictionary Entry | Posted 27/08/2015
Quote from "Miscellaneous Fragments [R]"

Logic is […] synonymous with semeiotic, the pure theory of signs in general.