This is not so much a stupid question as a stupid thing to do:
A while back, someone told me that they received a file from a client, and they needed to make many changes to it. Somehow, multiple versions of the file got saved, but the updates were scattered among many files. They needed to get all of the changes together in one file. So I looked at it, and I saw these file names like:
File
CopyofFile
CopyofCopyofFile
CopyofCopyofCopyofFile
They swore that they did not change the names of any of the files.
So I researched the original file the client sent us and discovered that the file was marked Read-Only, but also had the AutoSave feature turned on (every ten minutes). So if you had it open for more than ten minutes, it would resave it, but under a different name because of the Read-Only setting!
I explained to them that you probably never want to use both Read-Only and AutoSave on the same file, as they contradict what the other one is trying to accomplish!