You have chosen 'Notes on John Wilkins' by Gottfried Leibniz, 'A Realistic Theory of Categories' by Roderick Chisholm and 'The Nature of Existence vol.1' by J.M.E. McTaggart
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |