An earlier version of this paper was read at the annual meeting of the American Philosophical Association in Chicago 1973. The present draft has benefitted extensively from the observations made by the commentator Richard Hull. I am also thankful for the observations made by C. J. Bryant, M. Swain, M. Woodhouse and R. Arrington.
Notes
An earlier version of this paper was read at the annual meeting of the American Philosophical Association in Chicago 1973. The present draft has benefitted extensively from the observations made by the commentator Richard Hull. I am also thankful for the observations made by C. J. Bryant, M. Swain, M. Woodhouse and R. Arrington.