This is a contribution to a book on quantum gravity and philosophy. I discuss nature and origin of the problem of quantum gravity. I examine the knowledge that may guide us in addressing this problem, and the reliability of such knowledge. In particular, I discuss the subtle modification of the notions of space and time engendered by general relativity, and how these might merge into quantum theory. I also present some reflections on methodological questions, and on some general issues in philosophy of science which are are raised by, or a relevant for, the research on quantum gravity.
- Pub Date:
- March 1999
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- To appear on: "Physics Meets Philosophy at the Planck scale", C Callender N Hugget eds, Cambridge University Press