Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-27547895-20160131165120

Paul.rea wrote: If we didn't have Lydia's entire history with her abilities that might be a question. We do. It's not. We don't have Lydia's entire history, though. Her abilities weren't activated until after she was bitten. I'm not saying I'm on board with this theory, either.... but this is one of those situations (again) in which you claim to know more than you actually do. You actually know squat. For all you know Lydia's history could go back before the show started. There could be a whole lot we just don't know because it hasn't been shown, yet.

And, no, that stuff will not be canon until it IS shown... but, as long as it is possible, you can't claim that banshees are non-supernatural as canon, either.