I guess I didn't say all of it - yes, if it is a possibility, we should take it seriously. I think they are all possible, we should take them all seriously. I

I guess I didn't say all of it - yes, if it is a possibility, we should take it seriously. I think they are all possible, we should take them all seriously. I don't think there is any way to get to a scientific certainty either positively or negatively about any of the origin theories; thus we should take precautions about all of them.