ABSTRACT
Think of it this way: If A = B, then 0, which is to say: zero, zed, nothing. For anything to be thought, any given A, whatever its content, cannot be exactly identical to any given B. In social life, this is clearly true and practically well understood. If I am A, of whichever personal name (the name being just an arbitrary personal marker, as Erving Goffman put it), then I cannot be exactly the same in all essential aspects as any given B for if I were, then, as Mark Twain or some one like that once said, one of us would be useless.
