Tim Button. Fun fact: I'm Isaac Newton's Doktorur-15-enkel, and Galileo Galilei's Doktorur-18-enkel.

I am an Associate Professor of Philosophy, and Head of Department, at UCL.

I work at the area where philosophy meets mathematics and logic. Right now, I am thinking about theoretical equivalence, types, and sets. Here are some short words about some things I like.

I recently published a serialized trilogy on Level Theory at BSL. Before that, Sean Walsh and I published Philosophy and Model Theory (OUP, 2018). My first book was The Limits of Realism (OUP, 2013). I have made some open education resources. I am an associate editor of MIND.

You can email me at . This is my main site. I have less well maintained profiles at arXiv, google scholar, ORCID, PhilPapers, and UCL IRIS. (I have stopped maintaining my academia & SocArXiv profiles.)