Bastiaan Cornelis van Fraassen (born 5 April 1941 in the Netherlands) is a Distinguished Professor of Philosophy at San Francisco State University and the McCosh Professor of Philosophy Emeritus at Princeton University, teaching courses in the philosophy of science, philosophical logic and the role of models in scientific practice. He previously taught at Yale University, the University of Southern California (USC), the University of Toronto. He coined the term "constructive empiricism" in his 1980 book The Scientific Image. Van Fraassen earned his Ph.D. (1966, under the direction of Adolf Grünbaum) from the University of Pittsburgh. He is an adult convert to the Roman Catholic Church, and a fellow of the American Academy of Arts and Sciences, a Foreign Member of the Netherlands Royal Academy of Arts and Sciences, and a Corresponding Fellow of the British Academy, as well as co-winner of the Lakatos Award (1986), the International Giulio Preti Prize (2009), the Inaugural Hempel Award (Philosophy of Science Association 2012), and the Lauener Prize in Analytical Philosophy (2018).
His monographs include An Introduction to the Philosophy of Time and Space (1970), Formal Semantics and Logic (1971), The Scientific Image (1980), Laws and Symmetry (1989), Quantum Mechanics: An Empiricist View (1991), The Empirical Stance (2002), Scientific Representation: Paradoxes of Perspective (2008).