In my area of research distributing preprints of results is very common. Consider the following seqence of events:
- Group A finishes paper P, distributes it as a preprint and submits to a journal
- Group B posts related preprint Q
Group A receives referee reports for paper P. Referee requests discussion/citation of Q.
Group A responds that Q came later and was not used in writing P, therefore no detailed discussion/citation necessary.
Referee insists on discussion of Q in paper P
Who is in the right?