Yeah, what he says. IF the bearded man shows up, we are good to go! Listen to what he says in this video and tell me his thoughts are NOT coming from a logical, non-fear based mind!!! I realize those who NEED religion in their life will not for a second watch this video. They might be as scared as the lady in the video!!!
And all he needs to do is bring indisputable undeniable evidence that his science based theory is correct. He can no more deliver that evidence than the creationists can deliver on their "faith" based theory. Absolute certainty on the subject is not possible.
He doesn't need to bring indisputable undeniable evidence at all. All Tyson needs to do, which he does as a scientist, is bring his evidence as proof. No conclusion is necessary. All creationists can do is bring their conclusion without providing any evidence.
Credibility isn't fact, it's just where one would put their personal beliefs at any given time. Tyson has more credibility than your typical evangelist. That doesn't make him absolutely correct. Until undeniable, indisputable scientific evidence is attained it's a theory. Frankly a better theory than the Church presents, but a theory none the less. The debate continues and that's a good thing. Good science demands it.