© 1995 by British Society for the Philosophy of Science
Articles |
Temporal Asymmetry in Classical Mechanics
Department of History and Philosophy of Science, University of Melbourne Parkville 3052, Australia
This paper argues against a standard view that all deterministic and conservative classical mechanical systems are time-reversible, by asking how the temporal evolution of a system modulates parametric imprecision (either ontological or epistemic). It notes that well-behaved systems (e.g. inertial motion) can possess a dynamics which is unstable enough to fail at reversing uncertaintieseven though exact values are reliably reversed. A limited (but significant) source of irreversibility is thus displayed in classical mechanics, closely analogous the lack of predictability revealed by unstable chaotic systems.