You have chosen 'A Pragmatic Conception of the A Priori' by C.I. Lewis, 'Without Immediate Justification' by Michael Williams and 'Boole calculus and the Concept script' by Gottlob Frege
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
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