You have chosen 'To be is to be the value of a variable..' by George Boolos, 'Abstract of 'The Fourfold Root'' by Arthur Schopenhauer and 'On Carnap's Views on Ontology' by Willard Quine
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| A. | Classical Physics | |
| B. | Modern Physics | |
| C. | Space | |
| D. | Time | |
| E. | Cosmology | |
| F. | Chemistry | |
| G. | Biology |