You have chosen 'works' by Stanislaw Lesniewski, 'Fourfold Root of Princ of Sufficient Reason' by Arthur Schopenhauer and 'Review of Aron 'Our Knowledge of Universals'' by H.H. Price
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |