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Leonardi.DB
a logical geometry project

Manual of Elementary Logic (1867), p. 112
by Atwater, Lyman H.

Logic

Aristotelian family
Non-Sigma
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
0–2
Coplanarity range
0
Cospatiality range
0
Representation of contradiction
N.A.

Vertex description

Conceptual info
No
Mnemonic support (AEIO, purpurea ...)
Yes
Form
none
Label type
symbolic
Symbolic field
logic
Contains partial formulas or symbols
Yes
Logical system
syllogistics

Edge description

Contains definitions of relations
No
Form
dotted lines
,
none
Has arrowheads
No
Overlap
No
Curved
No
Hooked
No
As wide as vertices
No
Contains text
No
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

U = all S are all P
Y = some S are all P (in W. Hamilton's sense)

'Inconsistency' is defined as a subtype of contrariety (cf. p. 111).
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