Original sentence: There appear to be  five major theories  of time that have been developed, which go by the names  Pure A-theory, A-theory of time, B-theory of time, AB-theory of time, and the R-theory of time.There is no real consensus among philosophers about which, if any, theory is correct
Edited sentence: There appear to be five major theories of time that have been developed, which go by the names Pure A-theory, A-theory of time, B-theory of time, AB-theory of time, and the R-theory of time.There is no real consensus among philosophers about which theory is correct