You have chosen 'Nature and Observability of Causal Relations' by Curt Ducasse, 'Aristotle and the Metaphysics' by Vassilis Politis and 'Counting and the Natural Numbers' by Jeffrey H. Sicha
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |