1. On Philosophizing—and Some Logical Distinctions
2. Defining Conceptual Boundaries
3. Measuring and Counting: More Boundaries
Part 2. The Act of Scientific Seeing
4. There Is More to Seeing than Meets the Eye
5. Seeing the Same Thing
6. Seeing and Seeing As
7. Seeing As and Seeing That
8. Seeing, Saying, and Knowing
9. Spectacles behind the Eyes
10. Can We See Facts?
11. Facts and Seeing That
Part 3. Perplexity: the Process of Experimental Research
12. Waves, Particles, and Facts
13. Hypotheses Facta Fingunt
14. Scientific Simplicity and Crucial Experiments
15. The Systematic Side of Science
16. Discovering Causes and Becauses
17. What Happens as a Rule
18. Theory-Laden Language
19. The Scientists’ Toolbox
20. Laws, Truths, and Hypotheses
21. Principles as Platitudes
Part 4. Probability and Probable Reasoning in Science
22. Frequencies and the Mathematics of Probability
23. Using and Interpreting the Probability Calculus
24. Elements of Statistical Technique
25. The Principle of Uniformity Revisited
Editor’s Epilogue
Index
Norwood Russell Hanson was one of the most important philosophers of science of the post-war period. Hanson brought Wittgensteinian ordinary language philosophy to bear on the concepts of science, and his treatments of observation, discovery, and the theory-ladenness of scientific facts remain central to the philosophy of science. Additionally, Hanson was one of philosophy’s great personalities, and his sense of humor and charm come through fully in the pages of Perception and Discovery.
Perception and Discovery, originally published in 1969, is Hanson’s posthumous textbook in philosophy of science. The book focuses on the indispensable role philosophy plays in scientific thinking. Perception and Discovery features Hanson’s most complete and mature account of theory-laden observation, a discussion of conceptual and logical boundaries, and a detailed treatment of the epistemological features of scientific research and scientific reasoning. This book is of interest to scholars of philosophy of science, particularly those concerned with Hanson’s thought and the development of the discipline in the middle of the 20th century. However, even fifty years after Hanson’s early death, Perception and Discovery still has a great deal to offer all readers interested in science.