You have chosen 'The Value of Science' by Henri Poincaré, 'On the Nature of the Gods ('De natura deorum')' by M. Tullius Cicero and 'A Universe from Nothing' by Lawrence M. Krauss
start again | choose another area for these texts | all the ideas for this combination of texts| All the ideas for Existence, or select a subheading: |
| A. | Nature of Existence | |
| B. | Change in Existence | |
| C. | Structure of Existence | |
| D. | Theories of Reality | |
| E. | Categories |