Logic, Language, and Meaning. Volume 2. Intensional Logic and Logical Grammar (1991), p. 238
by Gamut, L. T. F.

Copyright according to our policy

Logic

Aristotelian family

Classical Sigma-2

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

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 ...)

No

Form

none

Label type

linguistic

Language

English

Lexical field

quantifiers

Contains partial sentences or single words

Yes

Contains abbreviations

Yes

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Tags

duality

Additional notes

Immediately below the diagram, we read: "This is the 'Square of Opposition' of traditional logic." (p. 238)