Topher, I think Joey is talking about the relative probability of life also forming elsewhere in this vast universe, not necessarily saying that aliens seeded the earth — although it is possible that life formed elsewhere in the solar system and came to earth via meteors etc.. (religion.blogs.cnn.com)
It is always possible that several different situations could have left the traces we have, and we have very few objective criteria for distinguishing between their relative probability.» (religion-online.org)
«History» as a category is too impoverished to contain it, and the usual historiocritical questions about the relative probability of different explanations are rendered useless. (religion-online.org)