Jeremy Fantl is a contemporary analytic epistemologist at the University of Calgary, best known for developing the theory of pragmatic encroachment on knowledge and justification alongside Matthew McGrath. He argues that practical factors—not merely evidential ones—determine what a person knows or is justified in believing, challenging traditional internalist and evidentialist epistemology. His work engages extensively with fallibilism, closure principles, and the relationship between knowledge, action, and rational belief.
Co-developed pragmatic encroachment theory, arguing practical stakes partly determine epistemic status
Advanced knowledge-action principles linking what one knows to what one is rational to do
Challenged traditional fallibilist accounts through analysis of knowledge under varying practical stakes
Contributed to debates on epistemic closure and skeptical hypotheses
Co-authored 'Knowledge in an Uncertain World' (2009, Oxford) with Matthew McGrath
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