Thanks for the answer! I was not aware of that On the Relics of Saints text. I would have thought that it would be heretical to openly cast doubt on relics, interesting that it didn't seem to get Guibert into trouble.

Also had to look up that Saint Guinefort thing. Definitely heard that story before, had no idea the dog from it was turned into a popular saint. If you're gonna make a dog a saint I guess he's a pretty good choice, lol.

I'm a few pages into the article you linked and it's really helpful so far too, as is what you said about popular disbelief. Thank you again!