You have chosen 'On Liberty' by John Stuart Mill, 'Aristotle on Substance' by Mary Louise Gill and 'Principles of Nature and Grace based on Reason' by Gottfried Leibniz
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |