Is the Principle of Contradiction a Consequence of $$x^{2}=x$$ x 2 = x?

Logica Universalis 12 (1-2):55-81 (2018)
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Abstract

According to Boole it is possible to deduce the principle of contradiction from what he calls the fundamental law of thought and expresses as \. We examine in which framework this makes sense and up to which point it depends on notation. This leads us to make various comments on the history and philosophy of modern logic.

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Jean-Yves Beziau
Federal University of Rio de Janeiro

Citations of this work

Universal Logic: Evolution of a Project.Jean-Yves Beziau - 2018 - Logica Universalis 12 (1-2):1-8.
1st World Logic Day: 14 January 2019.Jean-Yves Beziau - 2019 - Logica Universalis 13 (1):1-20.
Eigenlogic in the Spirit of George Boole.Zeno Toffano - 2020 - Logica Universalis 14 (2):175-207.

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References found in this work

Model Theory.Michael Makkai, C. C. Chang & H. J. Keisler - 1991 - Journal of Symbolic Logic 56 (3):1096.
Grundzüge der theoretischen Logik.D. Hilbert & W. Ackermann - 1928 - Annalen der Philosophie Und Philosophischen Kritik 7:157-157.
Logic, Semantics, Metamathematics.Atwell Turquette - 1958 - Philosophical Review 67 (1):113.
The power of the hexagon.Jean-Yves Béziau - 2012 - Logica Universalis 6 (1-2):1-43.
Truth in a Structure.Wilfrid Hodges - 1986 - Proceedings of the Aristotelian Society 86:135 - 151.

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