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Leonardi.DB
a logical geometry project

The Assimilation of Aristotelian and Arabic Logic up to the Later Thirteenth Century (2008), p. 317
by Lagerlund, Henrik

Caption

The Hexagon of Opposition

Logic

Aristotelian family
Sherwood-Cze┼╝owski Sigma-3
Boolean complexity
4
Number of labels per vertex (at most)
1
Uniqueness of the vertices up to logical equivalence
Yes
Errors in the diagram
No

Geometry

Shape
Hexagon (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
categorical
,
singular propositions
Contains partial sentences or single words
No
Contains abbreviations
No

Edge description

Style

Diagram is colored
No
Diagram is embellished
No
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