From the Logical Square to Blanché's Hexagon: Formalization, Applicability and the Idea of the Normative Structure of Thought (2012), p. 56
by Dufatanye, Aimable-André

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Logic

Aristotelian family

Contrariety 3-clique

Boolean complexity

3

Number of labels per vertex (at most)

1

Uniqueness of the vertices up to logical equivalence

Yes

Errors in the diagram

No

Geometry

Shape

Triangle (regular)

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

symbolic

Symbolic field

mathematics

Contains partial formulas or symbols

Yes

Mathematical branch

order theory

Edge description

Contains definitions of relations

No

Form

bold solid lines

Has arrowheads

No

Overlap

No

Curved

No

Hooked

No

As wide as vertices

No

Contains text

No

Label type

none

Style

Diagram is colored

No

Diagram is embellished

No

Additional notes

The negation closure of this diagram is a JSB sigma-3.