Abstract.
In logic, diagrams have been used for a very long time. Nevertheless philosophers and logicians are not quite clear about the logical status of diagrammatical representations. Fact is that there is a close relationship between particular visual (resp. graphical) properties of diagrams and logical properties. This is why the representation of the four categorical propositions by different diagram systems allows a deeper insight into the relations of the logical square. In this paper I want to give some examples.
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I would like to thank the two anonymous reviewers for helpful comments and criticisms.
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Bernhard, P. Visualizations of the Square of Opposition. Log. univers. 2, 31–41 (2008). https://doi.org/10.1007/s11787-007-0023-x
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DOI: https://doi.org/10.1007/s11787-007-0023-x