Dedicated to the most consequential question the human mind can entertain: whether God exists. Deploying the sharpest tools of analytic philosophy — modal logic, Bayesian epistemology, philosophy of cosmology — in service of that ancient question.
Leo Vassiliou is one of the foremost voices in contemporary analytic philosophy of religion. His work is characterised by a refusal to separate rigorous philosophical method from genuine theological conviction — deploying modal logic, Bayesian epistemology, and philosophy of cosmology in the service of natural theology's oldest and deepest question.
Educated at the University of York (BA, First Class) and Oxford (M.Phil. and D.Phil.), his doctoral dissertation — Probabilistic Theism and the Cumulative Case — was awarded the Sheppard Prize. He has held a Senior Research Fellowship at Wycliffe Hall, Oxford, since 2034, following a postdoctoral residency at Notre Dame's Center for Philosophy of Religion.
The world's first interactive Bayesian framework for evaluating arguments for the existence of God. Users input their credences across the major theistic arguments and receive a calculated posterior probability distribution across worldviews — from naturalism to Christian theism.
Built at the intersection of philosophy, probabilistic reasoning and software engineering — a project that began in a first-year computer science dorm room and became one of the most visited resources in online apologetics.
"Vassiliou has done for the 21st century what Plantinga did for the 20th — given theistic belief not merely a defence, but a philosophical architecture."
Available for speaking engagements, public debates, academic collaboration, media appearances, and questions about the Theism Probability Engine.