You have chosen 'General Facts,Phys Necessity, and Metaph of Time' by Peter Forrest, 'Boole calculus and the Concept script' by Gottlob Frege and 'The Foundations of Mathematics' by Frank P. Ramsey
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |