Home Philosophy 56 Entries for Dictionary of Philosophy and Psychology, 1900–1902
Chapter
Licensed
Unlicensed Requires Authentication

56 Entries for Dictionary of Philosophy and Psychology, 1900–1902

  • Ahti-Veikko Pietarinen
Become an author with De Gruyter Brill
Correspondence
This chapter is in the book Correspondence

 

R 1147, R S-97, Houghton Library. This chapter presents Peirce’s contributions to Baldwin’s Dictionary, including entries and their drafts on “Logic”, “Logic (Exact)”, “Logical Diagram”, and “Symbolic Logic”. Here, Peirce distills his mature logical framework, defining logic as the science of classifying valid inferences and introducing existential graphs as tools to render reasoning and representation visually intuitive and pedagogically progressive. He distinguishes between logica utens (practical reasoning) and logica docens (systematic theory), defines the meaning of deduction, critiques appeals to psychology or language in logic, and champions diagrammatic over algebraic methods for their “iconic” clarity. The entries on “Exact Logic” outline mathematical foundations, “Symbolic Logic” debates the ethics of notation and the limitations of received systems of logic. The unpublished draft entry “Logical Diagrams” presents a new extension of Euler Diagrams and proceeds to expound existential graphs in great detail. These texts crystallise Peirce’s synthesis of precision and innovation, laying the groundwork for his later mature work on logic and semiotics and affirming his legacy in formal logic’s modern evolution.

 

R 1147, R S-97, Houghton Library. This chapter presents Peirce’s contributions to Baldwin’s Dictionary, including entries and their drafts on “Logic”, “Logic (Exact)”, “Logical Diagram”, and “Symbolic Logic”. Here, Peirce distills his mature logical framework, defining logic as the science of classifying valid inferences and introducing existential graphs as tools to render reasoning and representation visually intuitive and pedagogically progressive. He distinguishes between logica utens (practical reasoning) and logica docens (systematic theory), defines the meaning of deduction, critiques appeals to psychology or language in logic, and champions diagrammatic over algebraic methods for their “iconic” clarity. The entries on “Exact Logic” outline mathematical foundations, “Symbolic Logic” debates the ethics of notation and the limitations of received systems of logic. The unpublished draft entry “Logical Diagrams” presents a new extension of Euler Diagrams and proceeds to expound existential graphs in great detail. These texts crystallise Peirce’s synthesis of precision and innovation, laying the groundwork for his later mature work on logic and semiotics and affirming his legacy in formal logic’s modern evolution.

Downloaded on 30.12.2025 from https://www.degruyterbrill.com/document/doi/10.1515/9783110766325-007/html
Scroll to top button