Misner, Charles WThe invited talk (not recorded) for which these slides were prepared discusses the properties of a physics law which suggest it should be called 'Evanescent'. This occurs when, in some domain, either – It becomes irrelevant or useless; – It is indefinable or misleading; – Its normal consequences can be evaded; or – It (rarely) is incorrect in some domain. Also I will make the evanescence case for energy and entropy on the cosmological scale.en-USphilosophy of science; philosophy of physics; relativity; cosmology; conservation of energy; entropy in cosmologyPresentation