Well, there's already really good circumstantial evidence of foreign craft, reverse engineered by humans... if you haven't watched all of the documentaries on Bob Lazar - go have a look. Fascinating interviews w/ Joe Rogan and the evidence/stuff he knew before it came to fruition is really interesting (element 115, for example).
So a and b1 are basically a given... but yet, b2 is still the most likely... LOL
Well, there's already really good circumstantial evidence of foreign craft, reverse engineered by humans... if you haven't watched all of the documentaries on Bob Lazar - go have a look. Fascinating interviews w/ Joe Rogan and the evidence/stuff he knew before it came to fruition is really interesting (element 115, for example).
So a and b1 are basically a given... but yet, b2 is still the most likely... LOL