You have chosen 'Contrib to Critique of Hegel's Phil of Right' by Karl Marx, 'Ordinary Objects' by Amie L. Thomasson and 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo
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| A. | Basis of Science | |
| B. | Scientific Theories | |
| C. | Induction | |
| D. | Explanation |