Teaching Legal Theory with Venn Diagrams (1998), p. 168
by Burgess-Jackson, Keith

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Logic

Aristotelian family

Classical Sigma-2

Boolean complexity

3

Number of labels per vertex (at most)

2

Equivalence between (some) labels of the same vertex

No

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

Square (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

iconic

,

philosophical theories

Edge description

Contains definitions of relations

No

Form

solid lines

Has arrowheads

No

Overlap

No

Curved

No

Hooked

No

As wide as vertices

No

Contains text

Yes

Label type

linguistic

Language

English

Contains partial sentences or single words

Yes

Contain abbreviations

No

Style

Diagram is colored

No

Diagram is embellished

No

Additional notes

Different positions from philosophy of law:

NL = natural law
PP = positive positivism
NP = negative positivism
SP = soft positivism (Hart)
D = Dworkin