John MacFarlane is an American professor of philosophy at the University of California, Berkeley interested in logic and metaphysics. He has made influential contributions to truth-value theory inferential semantics. In 2015, he was elected a Fellow of the American Academy of Arts and Sciences. He is also known for his contributions to open source software, especially the Pandoc document converter and other Markdown parsers and verifiers. MacFarlane was among the group of people that helped launch the CommonMark standardization effort for Markdown.
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Education
MacFarlane earned a bachelor's degree in philosophy from Harvard University and a PhD in philosophy at the University of Pittsburgh.
Career and research
Most of McFarlane's work is in the philosophy of logic and language. Other research interests include metaphysics and epistemology, the philosophy of mathematics, philosophical logic, the history of logic, Frege, Kant and ancient philosophy particularly Aristotle.