You have chosen 'Logic (Encyclopedia I)' by Georg W.F.Hegel, 'Intro to 2nd ed of Principia Mathematica' by Bertrand Russell and 'The Doctrine of Necessity Examined' by Charles Sanders Peirce
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |