The Critical Approach to Philosophy; 1: Rationality versus the Theory of Rationality; 2: Reflections on Karl Popper’s Epistemology; 3: What Hume Might Have Said to Kant; 4: Strength, Confirmation, Compatibility; 5: A Question about Plato’s Theory of Ideas; 6: Popper and Wittgenstein; 7: Confirmation, the Paradoxes, and Positivism; 8: Overlooked Aspects of Popper’s Contributions to Philosophy, Logic, and Scientific Method; The Critical Approach to Logic and Mathematics; 9: The Elimination of Variables by Regular Combinators 1; 10: On Popper’s Use of the Notion of Absolute Logical Probability; 11: Aristotle’s Theory of Modal Syllogisms and its Interpretation; 12: Logical Terminology and Theory of Meaning; The Critical Approach to Science; 13: The Nature of Scientific Problems and Their Roots in Metaphysics; 14: On the Problem of Truth and Understanding in Science; 15: The Mach Principle; 16: Phenomenological Theories; 17: The Simple Laws of Science and History; 18: The Neurophysiological Basis of Experience; 19: Realism and Instrumentalism: Comments on the Logic of Factual Support; 20: Observation and the Quantum; 21: Popper on Irreversibility; 22: The Theory of Complex Phenomena; 23: The Agreement between Mathematics and Physical Phenomena; 24: On the Reality of Elementary Particles; The Critical Approach to Society and History; 25: Social Science and Moral Philosophy: A Critical Approach to the Value Problem in the Social Sciences; 26: Popper and the Critical Philosophy of History; 27: The Open Society and Its Enemies; 28: The Tradition of General Knowledge; 29: Philosophy of History Before Historicism