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Christopher Izgin M.A.


Ancient Philosophy and History of Ancient Science (APhil/HistAS)


Humboldt University Berlin
Research Training Group
Philosophy, Science and the Sciences
Hannoversche Straße 6
10115 Berlin

since 10/2019
PhD candidate at the Research Training Group "Philosophy, Science and the Sciences" at Humboldt University Berlin

10/2018 – 09/2019
Research associate ("wissenschaftlicher Mitarbeiter") at the Department of Philosophy of Goethe University Frankfurt

04/2017 – 10/2018
Master of Arts in Classics (specialization in Greek Philology) at Humboldt University Berlin

04/2014 – 02/2018
Master of Arts in Philosophy at Goethe University Frankfurt

10/2010 – 11/2013
Bachelor of Arts in German Linguistics and Scandinavian Studies at Humboldt University Berlin

The Principle of Excluded Middle in Aristotle

In my dissertation, I provide a systematic account of the principle of excluded middle (PEM) in Aristotle. This principle states that everything either is or is not (an ontological formulation) or that everything is either affirmed or denied (a logical formulation). I focus on questions such as the following: How are the different formulations of this principle related to one another? What is the relation between PEM and other Aristotelian principles, such as the principle of non-contradiction? Are there any exceptions to PEM, such as future contingents? What is PEM's place within Aristotle's ontology and syllogistic? And how does Aristotle argue against those who deny PEM in Metaphysics Γ 7?