You have chosen 'Positivism and Realism' by Moritz Schlick, 'Investigations in the Foundations of Set Theory I' by Ernst Zermelo and 'The Gathas (seventeen hymns)' by Zoroaster
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Knowledge Criteria, or select a subheading: |
| A. | Justification Problems | |
| B. | Internal Justification | |
| C. | External Justification | |
| D. | Scepticism | |
| E. | Relativism |