Someone would have easily recreated or debunked these by now if they were not authentic. People working on such tech have even acknowledged that this is what you would expect. The patents are out there too, issued by the US navy.
I wonder what it is that makes people so resistant to this stuff despite the large amount of evidence. I guess it really is too much to reconcile, like the fact that the '69 moon landing was fabricated. Oh, THAT was real, but this... definitely faked. 😂
(I'm just ribbing ya, people are free to believe whatever they choose and I totally understand the skepticism.)
