You have chosen 'On the General Idea of Proof Theory' by Dag Prawitz, 'Presupposition and Conversational Implicature' by H. Paul Grice and 'Pref to new 'Materialist Theory'' by David M. Armstrong
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |