You have chosen 'Letters to Schlick' by Rudolph Carnap, 'The Aim and Structure of Physical Theory' by Pierre Duhem and 'Introduction of 'Essence of Christianity'' by Ludwig Feuerbach
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| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |