On Sat, 2012-06-02 at 21:21 -0700, C. M. Heard wrote: ... > > > In Section 6.1: > > > > > > > > >> Datagram de-duplication can be accomplished using hash-based > > >> duplicate detection for cases where the ID field is absent. > > >> > > > > > > Under what circumstances would the ID field be absent? > > > > Replace "absent" with "known not unique". > > Better, I think, would be "not known to be unique". Except that the two are not semantically equivalent. ...