Graph: Logical
(see also
Graph: Existential
)
"A logical graph is a graph representing logical relations iconically, so as to be an aid to logical analysis." ('Logical Tracts. No. 2. On Existential Graphs, Euler's Diagrams, and Logical Algebra', CP 4.420, c. 1903)
"A logical graph is a graph which asserts something, or represents an assertion, concerning a recognized universe, real or fictive." ('Logical Tracts. No. 1. On Existential Graphs', MS 491: 2, c. 1903)
"
Logical
Diagram (or Graph):
Ger. Logische Figur; Fr. Diagramme logique; Ital. diagramma
logico. A diagram composed
of dots, lines, &c., in which logical relations are signified by such
spatial relations that the necessary consequences of these logical relations
are at the same time signified, or can, at least, be made evident by
transforming the diagram in certain ways which conventional 'rules'
permit." ('Logical Diagram', DPP 2 / CP 4.347, 1902)
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