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- PhD, 1972
- : Physics Department
- : High Energy Physics
- Philosophy, Misc, Science, Logic, and Mathematics, Other Academic Areas
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- PhD, 2009
- : Logic And Methodology of Science
- : Logic
- Epistemology, Philosophy of Language, Logic and Philosophy of Logic
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- PhD, 1994
- : Mathematics
- : Mathematics
- Logic and Philosophy of Logic, Philosophy of Mathematics, Modal Logic, Theory of Computation, Set Theory, The Infinite, Mathematical Logic, Hypercomputation
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- PhD
- : Philosophy
- Epistemology, Philosophy of Mind, Philosophy of Cognitive Science, Philosophy of Consciousness
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- PhD, 2018
- : Group In Logic and The Methodology of Science
- : Logic and the Methodology of Science
- Metaphysics, Philosophy of Language, Logic and Philosophy of Logic
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- PhD, 2009
- Philosophy of Religion, The Argument from Evil, Religious Experience, Asian Philosophy, Continental Philosophy, European Philosophy
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- PhD, 2002
- : Department of Political Science
- : Political Science
- Social and Political Philosophy, Liberalism, Political Libertarianism, Republicanism
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- PhD, 2001
- : Logic And Methodology of Science
- : Logic
- Logic and Philosophy of Logic, Philosophy of Mathematics, 20th Century Philosophy
