From July 2013, I am Chair Professor of Theoretical Philosophy at Uppsala University. I received my PhD at MIT in 2000. Before coming to Uppsala, I taught at William Paterson University of New Jersey, University of Iceland, University of Colorado at Boulder, and, from 2005 to 2013, at Cornell University. I have published mainly in metaphysics, philosophy of language and philosophy of logic. One special area of interest is the liar and sorites paradoxes. Another is metaontology. Among other things I have been thinking about lately are theories of truth, Bradley’s regress and the unity of the proposition, and some issues at the intersection of philosophy of language and metaethics.