On Existential Graphs as an Instrument of Logical Research

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Manuscript Metadata

Resource ID

926

Access

Open

Contributed by

Frederik Wellmann

type of material

A. MS. notebook

description

Evidently prepared as an address to the American Academy. CSP mentions that existential graphs were discovered by him late in 1896, but that he was practically there some fourteen years before. The graphs were not invented to serve as a calculus, but to dissect the inferential process. Two puzzles examined with a view toward testing the system of graphs. One puzzle concerns the relation of signs to minds, and of communication from one mind to another. The other puzzle concerns the composition of concepts and the nature of judgment or, antipsychologically speaking, propositions, Signs; reality; conventions of the system of existential graphs.

general index

Conception and Concept, Graphs existential, Graphs logical (see also Diagram Eulerian; Graphs), Inference, Judgment, Logic (modal see Modality), Proposition, Reality, Sign(s)