Except of course nobody who makes them claims they’re made by aliens, so there are NO fakes because they’re not pretending anything. And there’s no group 3, they’re all very readily explained.
It’s good to believe in possibilities. But don’t be sucker. Aliens aren’t traveling gazillions of miles to graphitize our corn.
Actually, by fake, I mean man made.
And number three are not readily explained, by definition. That’s why they are in number 3.
I’ve studied this off and on for about 30 years. I don’t get into alien stuff, but I can tell you there is plenty of proof that they are not explainable by “man made” methods.
This is why I’ve been studying it “off and on” for so long. I keep expecting a good explanation to be forthcoming, but it never is.
So, I dunno...