The concerns I’ve managed to publish on (so far) range more narrowly over logic, philosophy of logic, philosophy of mathematics, philosophy of language, metaphysics and epistemology. I’ve written a lot of articles on mathematical proof, on ontology, and on philosophy of language. My books—the ones published so far—range over these topics, as well as topics in epistemology. I write on topics that draw my attention, that puzzle me, that fascinate me, and only when I realize that I have something fresh and new to say about them. I won’t go near writing about anything otherwise.

(I’m claustrophobic: really. If I try to write about something that I’m not drawn to writing about—drawn because I’m excited, puzzled, and because my compulsive word tendencies have been activated by the topic—I feel instead the same way I’d feel if my head was stuck in a small box: trapped.)