You have chosen 'Counterpart theory and Quant. Modal Logic' by David Lewis, 'Ontological Ground of Alethic Modality' by Scott Shalkowski and 'Mathematics: Form and Function' by Saunders MacLane
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |