The Largest Proper Parts of a Mereological Whole: A Refutation of Classical Extensional Mereology

  • 1 Department of Philosophy, Director of Honors Program, Doane College, 1014 Boswell Ave, Crete, NE 68333, USA
Patrick Monaghan


In this essay, I define the notion of the largest proper parts of a mereological whole. I then argue that since there are some entities that have such parts, it follows that classical extensional mereology is false.

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Metaphysica provides an international forum of ontology and metaphysics for readers all over the world. The journal is published biannually.