The key word is evidence.
Within a court of law there are dozens of rules of evidence (and exceptions if
you can meet them) that have grown up over the years that control just what is heard
by the jury.
I suppose the defendant can try and claim that an alien from a UFO held him
under duress or something, but the defendant would first be required to put on
evidence of the actual existence of the UFO. Following the rules of evidence.
That's one reason insanity defenses are rarely used. It's damned hard to prove
that the individual met the tests that the courts demand.
Oh, and contrary to any protestations of any Xian to the contrary, the Bible
is pure second, third, or fourth hand hearsay. And the only hearsay exception that I
see it qualifying for is one that a believer might not wish to urge.--That there
simply IS no other evidence available. So if anyone EVER tells you that the Bible
would be excellent evidence in a court of law, he is quite wrong.
Ciao.
-- Michael Fisher, ET1/SS USN ret., law student* * * He that would make his own liberty secure, must guard even his enemy from oppression; for if he violates this duty, he establishes a precedent that will reach to himself. Thomas Paine