You're using an ancient browser to surf the modern web. Please update to the latest version (and don't use Internet Explorer!).

Leonardi.DB
a logical geometry project

Frege's Lectures on Logic. Carnap's Student Notes 1910-1914 (2004), p. 70
by Frege, Gottlob; Carnap, Rudolf; Reck, Erich H. (ed.); Awodey, Steve (ed.)

Logic

Aristotelian family
Classical Sigma-2
Boolean complexity
3
Number of labels per vertex (at most)
1
Uniqueness of the vertices up to logical equivalence
Yes
Errors in the diagram
Yes

Geometry

Shape
Rectangle (irregular)
Colinearity range
0
Coplanarity range
0
Cospatiality range
0
Representation of contradiction
By central symmetry

Vertex description

Conceptual info
No
Mnemonic support (AEIO, purpurea ...)
No
Form
none
Label type
linguistic
Language
English
Lexical field
syllogistics
Contains partial sentences or single words
Yes
Contains abbreviations
No

Edge description

Style

Diagram is colored
No
Diagram is embellished
No

Additional notes

Subalternation is not explicitly visualized. At the bottom edge of the diagram, "contrary" should be "subcontrary".
↑ Back to top ↑