You have chosen 'Varieties of Things' by Cynthia Macdonald, 'Remarks on the forces of inorganic Nature' by J.R. Mayer and 'Pref to new 'Materialist Theory'' by David M. Armstrong
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| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |