Did time have a beginning?

Abstract
By analyzing the meaning of time I argue, without endorsing operationalism, that time is necessarily related to physical systems which can serve as clocks. This leads to a version of relationism about time which entails that there is no time 'before' the universe. Three notions of metaphysical 'time' (associated, respectively, with time as a mathematical concept, substantivalism, and modal relationism) which might support the idea of time 'before' the universe are discussed. I argue that there are no good reasons to believe that metaphysical 'time' can be identified with what we ordinarily call time. I also briefly review and criticize the idea of time 'before' the big bang, associated with some recent speculative models in modern cosmology, and I argue that if the big bang model is a (roughly) correct description of our universe, then the best current answer to the question in the title is that time did have a beginning
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Citations of this work BETA
Svend E. Rugh & Henrik Zinkernagel (2008). On the Physical Basis of Cosmic Time. Studies in History and Philosophy of Science Part B 40 (1):1-19.
Robert Brandenberger (forthcoming). Do We Have a Theory of Early Universe Cosmology? Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics.
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