STRANGER: Then we may suppose the same to be a fourth class, which is now to be added to the three others.
THEAETETUS: Quite true.
STRANGER: And shall we call the other a fifth class? Or should we consider being and other to be two names of the same class?
THEAETETUS: Very likely.
STRANGER: But you would agree, if I am not mistaken, that existences are relative as well as absolute?
THEAETETUS: Certainly.
STRANGER: And the other is always relative to other?
THEAETETUS: True.
STRANGER: But this would not be the case unless being and the other entirely differed; for, if the other, like being, were absolute as well as relative, then there would have been a kind of other which was not other than other. And now we find that what is other must of necessity be what it is in relation to some other.
THEAETETUS: That is the true state of the case.