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Leonardi.DB
a logical geometry project

'My Future Son is Possibly Alive'. Existential Presupposition and Empty Terms in Abelard's Modal Logic (2018), p. 350
by Binini, Irene

Caption

The square of opposition for singular modal propositions

Logic

Aristotelian family
Classical Sigma-2
Boolean complexity
3
Number of labels per vertex (at most)
3
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
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
Label type
linguistic
Language
English
Lexical field
modalities
Contains partial sentences or single words
No
Contains abbreviations
No

Edge description

Style

Diagram is colored
No
Diagram is embellished
No
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