You have chosen 'On the Question of Absolute Undecidability' by Peter Koellner, 'Letters to Thomas Burnett' by Gottfried Leibniz and 'Letters to Jacques Lenfant' by Gottfried Leibniz
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |