Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-27547895-20160202171654

Paul.rea wrote: They could thread back through some Lorraine/DD contact which would bring it all together but then we have Meredith who isn't part of that family. So it makes it a bit more complicated to make them all created fakes. Yeah, but Meredith has never dealt with mountain ash as far as I know, and there is no evidence that Lydia's grandmother actually directly handled mountain ash.

The only thing we really know is that Lydia has... which means that Lydia could be the only artificial banshee. As far as what you consider canon (Deaton's words) this is still possible.

Therefore, you cannot state banshee as non supernatural because certain things merely suggest it. We still have possibilities that fit within what Deaton said.

And that's all just supposing Deaton is correct in the first place.