Not rational in any sense. Rational doesn't mean 'believable', and simply the fact that other, equally reputable, people have claimed to have made up all the characters removes it from the realm of possibility. If the President of the United States, or any country, for that matter, claimed to have experienced this and undertook all the aforementioned tests, even if Richard Dawkins himself backed up the President's story, this is still firmly in the realm of the impossible.
As unlikely as them both being sociopathic liers is, it would still be more unlikely that this event occured.
As unlikely as them both being sociopathic liers is, it would still be more unlikely that this event occured.