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Leonardi.DB
a logical geometry project

Elementos de Lógica (2004), p. 61
by Barco Gómez, Carlos

Caption

Cuadro de oposición de las proposiciones modales

Logic

Aristotelian family
Classical Sigma-2
Boolean complexity
3
Number of labels per vertex (at most)
3
Equivalence between (some) labels of the same vertex
No
Analogy between (some) labels of the same vertex
Yes
Uniqueness of the vertices up to logical equivalence
Yes
Errors in the diagram
No

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 ...)
Yes
Form
rounded rectangular shapes
Label type
linguistic
Language
Spanish
Lexical field
modalities
Contains partial sentences or single words
Yes
Contains abbreviations
No

Edge description

Contains definitions of relations
No
Has arrowheads
Yes
Overlap
Yes
Curved
No
Hooked
No

Style

Diagram is colored
No
Diagram is embellished
No
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