> First, we know with absolute certainty that here is substantially different from anywhere else: we know there's life here, we haven't found life anywhere else

> First, we know with absolute certainty that here is substantially different from anywhere else: we know there's life here, we haven't found life anywhere else No we do not. We haven't looked anywhere else, we don't yet really have that ability. There's no reason at all to believe this place is special.