Histoire d'*O: Lexical Pragmatics and the Geometry of Opposition (2012), p. 406
by Horn, Laurence

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Logic

Aristotelian family

Jacoby-Sesmat-Blanché Sigma-3

Boolean complexity

3

Number of labels per vertex (at most)

4

Equivalence between (some) labels of the same vertex

No

Analogy between (some) labels of the same vertex

No

Uniqueness of the vertices up to logical equivalence

Yes

Errors in the diagram

Yes

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 ...)

Yes

Form

none

Label type

linguistic

,

symbolic

Language

English

Lexical field

propositional connectives

Contains partial sentences or single words

Yes

Contains abbreviations

No

Symbolic field

bitstrings

,

logic

Contains partial formulas or symbols

Yes

Contains protobitstrings

No

Bitstring length

4

Logical system

syllogistics

,

propositional logic

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Tags

Boolean closed

Additional notes

In the lower right corner, *and should be corrected to *nand.