In this summation of his views on a range of topics in metaphysics and epistemology, Chisholm defends a non-Aristotelian theory of categories. He argues that th... » 

In this summation of his views on a range of topics in metaphysics and epistemology, Chisholm defends a non-Aristotelian theory of categories. He argues that there are necessary things and contingent things, necessary things being things that are not capable of coming into being or passing away. «