Why the Logical Hexagon? (2012), p. 88
by Moretti, Alessio

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Caption

PG-geometry: from PG-square to PG-cube

Logic

Aristotelian family

Classical Sigma-2

Boolean complexity

3

Number of labels per vertex (at most)

1

Errors in the diagram

No

Geometry

Shape

Square (regular)

Colinearity range

0

Coplanarity range

0

Cospatiality range

0

Representation of contradiction

By central symmetry

Vertex description

Conceptual info

Yes

Mnemonic support (AEIO, purpurea ...)

No

Form

dots

Edge description

Contains definitions of relations

No

Form

solid lines

Has arrowheads

Yes

Overlap

No

Curved

Yes

Hooked

No

As wide as vertices

No

Contains text

Yes

Style

Diagram is colored

Yes

Diagram is embellished

No