Kripke-platek Set Theory With Urelements

Famous quotes containing the words set and/or theory:

    The moral earth, too, is round! The moral earth, too, has its antipodes! The antipodes, too, have their right to exist! There is still another world to be discovered—and more than one! Set sail, you philosophers!
    Friedrich Nietzsche (1844–1900)

    Could Shakespeare give a theory of Shakespeare?
    Ralph Waldo Emerson (1803–1882)