The Exact Intuitionistic Meaning of the Square of Opposition (2017), p. 292
by Vidal-Rosset, Joseph
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Caption
- Implications valid in CFOL
- Aristotelian family
- Non-Sigma
- Boolean complexity
- 3
- Number of labels per vertex (at most)
- 1
- Uniqueness of the vertices up to logical equivalence
- No
- Errors in the diagram
- No
- Shape
- Square (regular)
- Colinearity range
- 0
- Coplanarity range
- 0
- Cospatiality range
- 0
- Representation of contradiction
- N.A.
Logic
Geometry
- Conceptual info
- No
- Mnemonic support (AEIO, purpurea ...)
- No
- Form
- none
- Label type
- symbolic
- Symbolic field
- logic
- Contains partial formulas or symbols
- No
- Logical system
- predicate logic
- Contains definitions of relations
- No
- Form
- none ,
- double solid lines
- Has arrowheads
- Yes
- Overlap
- Yes
- Curved
- No
- Hooked
- No
- As wide as vertices
- No
- Contains text
- No
- Label type
- none
Vertex description
Edge description
- Diagram is colored
- No
- Diagram is embellished
- No
- Tags
- existential import
Style
Additional notes
- The negation closure of this diagram is a classical sigma-2.