Abstract

Professor arthur prior has argued that because one thing can become two things we must abandon leibniz's law. ("time, Existence and identity" in 'papers on time and tense', Oxford, 1968). I argue that while it does often happen that one thing becomes two things, We need not say that in such cases one thing is identical with both the things it becomes. Fission need not be seen as preserving identity. Hence prior does not provide us with adequate reasons for abandoning leibniz's law