[[!comment format=mdwn
 username="zardoz"
 ip="78.48.163.229"
 subject="comment 3"
 date="2014-08-16T13:58:28Z"
 content="""
One scenario where the above guarantee would be violated is when one
moves a new file of identical size, basename, and mtime, into a path
where a key-colliding file has been kept before. Still, I’d consider
this a scenario one could reasonably control for (especially in the
archive usecase); plus, even without manual control such a
move-induced collision would be much more unlikely than a collision of
basenames only.

"""]]