You have chosen 'Sense Data and the Percept Theory' by Roderick Firth, 'On the spiritual perfection of life' by Thomas Aquinas and 'Criterion of Validity in Reasoning' by Charles Sanders Peirce
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Knowledge Sources, or select a subheading: |
| A. | A Priori Knowledge | |
| B. | Perception | |
| C. | Rationalism | |
| D. | Empiricism | |
| E. | Direct Knowledge |