On reading ‘The epistemic value of gain of function experiments,’ by Arturo Casadevall, Ferric. C. Fang and Michael J. Imperiale. mSphere 2023.   Still life, 1975 by André Lwoff. Nobel Prize in Physiology and Medicine 1965 along with Jacques Monod and François Jacob.   This article emphasizes the need to use words precisely; to make...