You can quite easily disprove the existence of Luke Skywalker as a real entity, You can prove this by knowing the Actor/writer/Filmmaker that created it as a piece of fiction and those people with verify this as true. I suppose you do not see any evidence of genetic manipulation in early man in your profession as an Alien Sociology student.
The author (aside: did George Lucas write the story himself?) might have been unknowingly been writing about real people and real events, through some unknown means which planted them in his mind in a way that he experienced as his own imagination. Is that really so much more implausible than the revelation stories of religions?
The author might have been contacted somehow by someone from another part of the universe (though not necessarily from a galaxy far away) and given the story for some reason, but was sworn to secrecy and told to present it as a work of his own imagination.
So you can't easily disprove the Star Wars stories. Which doesn't mean they actually are a true history, of course.
As for the genetic manipulation thing, that's why I said I attach a much higher probability to it - I consider it more plausible that it could have happened without any clear evidence showing nowadays.
Why is it impossible, would it not be possible to bulid a ship large enough to carry the local flora and fauna of a given area. Improbable, but not impossible.
No, it would not be possible to build a ship as per the story. The story doesn't talk about
local flora and fauna. Also, you're talking about up to 14 of each and every animal, plus all the necessary food and drink for 40 days and nights. Then there's the issue of urine and faeces from this horde of animals. Then there's the issue of exercise space. Then there's the issue of keeping them apart so they don't kill each other. Or eat any of the huge tonnage of land plants you'd be bringing as well, together with the soil and water to keep those plants alive.
All this in a wooden boat that could be built millenia ago. Even now, wooden boats cannot be made anywhere near large enough. Even if you ignored the religious story and made it only local flora and fauna, you still couldn't get within orders of magnitude of the required size. Even the current US Navy's huge aircraft carriers wouldn't be anywhere near big enough. Wooden boats, even when reinforced by steel, just a couple of hundred feet long leak like sieves and need constant pumping even in calm seas.
The only way the Noah's Ark story could make sense as written is if it was a spaceship and the flora and fauna were stored as genetic samples to be grown 40 days later when the ship reached Earth.
If you assume the Adam and Eve characters to be referencing Tribes of Mankind, instead of individuals, then a case can be made to its authenticity in parts.
I'm not sure what you mean by that. Are you referring to two hunter-gatherer tribes meeting and founding the first permanent settlement? That might have been enough of a change to become seen generations later in that settlement as the beginning of more or less everything.
A case can be made to its authenticity in parts with individuals. There is strong evidence of a very great deal of common ancestry between humans across the world.