Abstract
In these controversy exchanges, the beginning article will have stated the opening authors thinking with a completeness and coherence to which the later surrebuttal will neither need nor be able to aspire. I see my function at this time as relatively limited: (a) to clear up a confusion that inhabits Professor Blocks introductory remarks and (b) to respond to him on the main points he has made. Clearing up confusion will not be as intellectually interesting as the more substantive discussion but is necessary because I believe that my message may have become obscured.