You have chosen 'Realistic Rationalism' by Jerrold J. Katz, 'Frege's Concept of Numbers as Objects' by Crispin Wright and 'Reply to 'Rorarius' 2nd ed' by Gottfried Leibniz
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |