Introduction (2020), p. 36
by Hodges, Wilfrid

Copyright according to our policy

Logic

Aristotelian family

Non-Sigma

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

Digon (regular)

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

linguistic

Language

English

Lexical field

indefinite

Contains partial sentences or single words

No

Contains abbreviations

Yes

Edge description

Style

Diagram is colored

No

Diagram is embellished

No

Additional notes

The two vertices are subcontrary to each other; cf. "Finally (viii) is between indeterminates, which behave like particulars (22,8), and so (viii) likewise is between semantic subcontraries." (p.38).

The negation closure of this diagram is a classical sigma-2 diagram.