Abstract
Jensen and Hewings have devoted most of their comments to our work as presented in a number of papers dated between 1977 and 1982. It might be noted that the tone and content of their current paper is quite different from that adopted in an earlier paper by Jensen. In the present paper we attempt to respond to their major criticisms and reservations one by one and to clarify a number of points where there appears to be some confusion about our purposes and our approach.