Susan Haack

Susan Haack is a philosopher of logic, language, and evidence who built her career on a single, exacting conviction: that the two dominant traditions in Western epistemology—foundationalism’s demand for bedrock certainty and coherentism’s reliance on mutual support—are each half right and together insufficient, and that the adequate theory of knowledge must hold both requirements simultaneously. The framework she constructed, foundherentism, uses the crossword puzzle as its governing image: every answer must match its clue (the experiential anchor) and intersect correctly with crossing entries (the coherence of the whole), and neither dimension can substitute for the other. Haack trained at Oxford and Cambridge under distinguished analytic philosophers and taught for decades at the University of Miami, publishing landmark works in formal logic, philosophy of science, and legal epistemology. Her Evidence and Inquiry (1993) presented foundherentism in full technical detail; Defending Science—Within Reason (2003) applied it to the philosophy of science;