His main research interests are in epistemology, the philosophy of logic, the philosophy of language, metaphilosophy, and mental illness. He is interested in the nature of paradox, vagueness, the liar paradox, indeterminacy, skepticism, knowledge, truth, assertion, context, relativism, time, conceptual engineering, neutralism, and the open future.
For 2003-4, he was an Arché Research Fellow in the AHRC Project Vagueness: Its Nature and Logic. In 2007-8, he was a Research Fellow in the ARC Epistemic Warrant Project, Australian National University. From 2009-11, he was a Research Fellow at the Centre for Time, University of Sydney. He was a network member for Perspectival Thoughts and Facts (PETAF), 2010-13. He was also the UConn Distinguished Visiting Professor for 2010. He was the co-investigator (with Crispin Wright) for the Leverhulme Project Relativism and Rational Tolerance, University of Aberdeen, 2014-15. Patrick was a visiting research fellow at ConceptLab, University of Oslo, April 23rd – July 2nd 2017, and for April – July 2018. He was a member of the LOGOS Project Fallibility, Rational Belief, and Knowledge, (FARBEK), University of Barcelona, 2014-18.
He is also the PhilPapers editor for Truth.