> I'm, too, more convinced by the Rare Earth hypothesis, I think you are misinterpreting the conclusion of the paper. The conclusion is that there is "a substa

> I'm, too, more convinced by the Rare Earth hypothesis, I think you are misinterpreting the conclusion of the paper. The conclusion is that there is "a substantial probability that we are alone in our galaxy". This extra probability is because of the extra uncertainty within our estimates of the parameters in the Drake equation. But "substantial probability" is something entirely different than being sure.