Peter Jeremy Roach Millican[1] (born 1 March 1958) is Gilbert Ryle Fellow and Professor of Philosophy at Hertford College, University of Oxford, in the United Kingdom.

[3] From 2014 to 2017 he maintained EarlyModernTexts.com, a site which hosts the writings of famous Early Modern writers in a somewhat modified form to make the text simpler to understand.

Millican later obtained his PhD with a thesis on Hume, induction and probability, and also a research MSc in computer science, while employed at Leeds.

To encourage students in the Humanities to get involved in Computing, Millican has developed a number of user-friendly software teaching systems.

In late October 2008, shortly before the presidential election, Republican Congressman Chris Cannon and his brother-in-law attempted to hire Millican to prove Ayers' authorship using computer analysis.

[13][14][15][16] After some analysis Millican later criticised the claim, saying variously that he had "found no evidence for Cashill's ghostwriting hypothesis", that it was "unlikely"[17] and that he felt "totally confident that it is false".

[15] In 2024, Millican was invited to teach a Masterclass for the inaugural Nanyang Technological University Turing AI Scholarship Programme.

[20] By coming fifth—after Ulf Andersson, Gert Jan Timmerman, Joop van Oosterom, and Hans-Marcus Elwert, Millican qualified in 1997 as an International Correspondence Chess Grandmaster.