Between Square and Hexagon in Oresme's Livre du Ciel et du Monde (2020), p. 39
by Demey, Lorenz

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Caption

Various visualizations of the abstract JSB hexagon: (a) regular hexagon with equilateral contrariety triangle, (b) regular hexagon with isosceles contrariety triangle, (c) small contrariety triangle inside large subcontrariety triangle, (d) small subcontrariety triangle inside large contrariety triangle, (e) octahedron.

Logic

Aristotelian family

Jacoby-Sesmat-Blanché Sigma-3

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

Octahedron (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 ...)

Yes

Form

none

Label type

symbolic

Symbolic field

logic

Contains partial formulas or symbols

Yes

Logical system

syllogistics

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Tags

Boolean closed

;

Leuven