Originally posted by Bosse de Nage
Isn't using (your) current scientific knowledge as a benchmark for probability a little tautological?
The Aztecs (according to one account) were so gobsmacked by the unprecedented phenomenon of the horses of Cortez, so culturally challenged in finding a way to account for and deal with them, that they couldn't fight effectively against them, their ...[text shortened]... blow the Aztecs' minds like that, why shouldn't alien technology surpass your understanding?
"Any sufficiently advanced technology is indistinguishable from magic." Arthur C. Clarke
It seems you agree with him. I disagree. I believe we are currently capable of identifying some impossible things.
Further I think the aztecs would have done well to consult their 'wise man' rather than relying entirely on the testimony of a witness who was terrorized by a horse - who probably announced that he met some devils flying on monsters.
I am not saying we throw out the witnesses statement, I am saying that the interpretation of what he saw should not be done by the witness.
As for the whole probability calculation we have two possibilities I have suggested:
1. Alien + interstellar space travel + telepathy machine + odd tactic of communicating weird messages to particular people.
2. Man made telepathy machine + odd tactic of communicating weird messages to particular people.
Clearly 1. is less probably than 2 as 1 practically requires 2 then adds to extra highly improbables.