A while back I
wrote about a self-publicising vanity author. One of
the details I'd liked to have note was the complete (or near-complete)
absence of his books in public library catalogues, but it's almost
impossible to actually find a way to cite a "negative search" much
less a positive result...
Indeed, that would end up being OR - quite simple OR, but OR all the
same. It's annoying when you know something that apparently no-one has
published, but there isn't much we can do about it. (Unless you happen
to be an expert on the subject and can publish it yourself)
You can't make the real problem in an article go away by writing the
letters "OR" on a post-it note, and sticking it on. That's being
simplistic.
Ec