On Wed, 17 Dec 2008, Thomas Dalton wrote:
NOR is a list of things you can't do, not a list of things you can. Noting that two things are the same when there is no way a reasonable person could fail to reach the same conclusion after seeing both sources is not on the list of unacceptable things, thus (unless prohibited by other policy) it is acceptable.
"You can do it as long as anyone reasonable can reach that conclusion" 1) is not so much a rule as it is a pragmatic statement about not getting caught violating the rule, and 2) is heavily subject to the heckler's veto; someone who's either out to cause trouble or (more likely) simply too anal and literal-minded about rules says "I'm sorry, I don't accept that" and forces you to take it out. Completely at random.