Generalization and Composition of Modal Squares of Oppositions (2016), p. 319
by Pizzi, Claudio

Copyright according to our policy

Caption

Graphical representation of a degenerate square

Logic

Aristotelian family

A Single PCD

Boolean complexity

2

Number of labels per vertex (at most)

2

Equivalence between (some) labels of the same vertex

Yes

Analogy between (some) labels of the same vertex

No

Uniqueness of the vertices up to logical equivalence

Yes

Errors in the diagram

No

Geometry

Shape

Digon (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 ...)

No

Form

none

Label type

symbolic

Symbolic field

logic

Contains partial formulas or symbols

No

Logical system

modal logic

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Tags

Boolean closed

Additional notes

An alternative visualization of this diagram occurs at p. 319; cf. here.