BA (Leeds), MA, BPhil, DPhil (Oxford), FRSE Professor
I joined the department at Stirling in 1993 and was appointed Professor in 2003.
Member of The Editorial Board of The Philosophical Quarterly
Member AHRC Peer Review College
My research interests are in the history of analytic philosophy and the philosophy of logic and mathematics. The principal focus of much of my research has been Wittgenstein's Tractatus Logico-Philosophicus; surrounding this work, I have published papers on Frege, Russell, and Ramsey.
From 2003-2006 I was involved in an AHRC-funded research project on the interpretation of the Tractatus which aimed to explore how Wittgenstein's critical conception of the task and method of philosophy emerges out of his detailed engagement with the logical theories of his predecessors in the analytic tradition. Since then I have been working particularly on Ramsey, both in his own right and as a resource for understanding Wittgenstein.
Sullivan P & Johnston C (2018) Judgments, Facts, and Propositions: Theories of Truth in Russell, Wittgenstein, and Ramsey. In: Glanzberg M (ed.) The Oxford Handbook of Truth. Oxford Handbooks. Oxford: Oxford University Press, pp. 150-192. https://global.oup.com/academic/product/the-oxford-handbook-of-truth-9780199557929.