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Leonardi.DB
a logical geometry project

Oppositions in Rough Set Theory (2012), p. 506
by Ciucci, Davide; Dubois, Didier; Prade, Henri

Caption

The tetrahedron of the 16 binary connectives

Logic

Aristotelian family
Classical Sigma-7
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
Tetrahedron (regular)
Colinearity range
1
Coplanarity range
1
Cospatiality range
0
Representation of contradiction
By central symmetry

Vertex description

Conceptual info
No
Mnemonic support (AEIO, purpurea ...)
No
Form
none
Label type
symbolic
Symbolic field
logic
Contains partial formulas or symbols
No
Logical system
propositional logic

Edge description

Style

Diagram is colored
No
Diagram is embellished
No
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