La logique de Théophraste (1947), p. 93
by Bocheński, Jozef

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Logic

Aristotelian family

Non-Sigma

Number of labels per vertex (at most)

1

Uniqueness of the vertices up to logical equivalence

No

Errors in the diagram

No

Geometry

Shape

Dodecagon (irregular)

Colinearity range

0

Coplanarity range

0

Cospatiality range

0

Representation of contradiction

N.A.

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

modal syllogistics

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Additional notes

S stands for 'necessity';
M stands for 'possibility';
Z stands for 'actuality';
N stands for negation.

Uba = all B are A
Iba = some B are A
Yba = no B are A
Oba = not all B are A

In order to close this diagram under negation, one would have to add the negation of MUba/MYba and that of MIba/MOba.