La proposition particulière et les preuves de non-concluance chez Aristote (1969), p. 7
by Brunschwig, Jacques

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Logic

Aristotelian family

A Single PCD

Boolean complexity

2

Number of labels per vertex (at most)

1

Uniqueness of the vertices up to logical equivalence

No

Errors in the diagram

No

Geometry

Shape

Rectangle (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

symbolic

Symbolic field

logic

Contains partial formulas or symbols

No

Logical system

syllogistics

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Tags

Boolean closed

Additional notes

$Ai_2B$ and $Ao_2B$ are equivalent to each other, and mean that some but not all As are B. (This is often called the Y-vertex in a JSB sigma-3.)

$Aa_2B$ and $Ae_2B$ are equivalent to each other, and mean that all or no As are B. (This is often called the U-vertex in a JSB sigma-3.)