You have chosen 'On Liberty' by John Stuart Mill, 'The Approach to Metaphysics' by Charles Sanders Peirce and 'The Nature of Universals and Propositions' by G.F. Stout
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
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