this post and J2Ss next 8 posts after it by J2S are some of the most brilliant logical, commonsense and concise postings i have read on this subject, great stuff J2S.The fact we exist suggest that intelligent life can exist in this galaxy (having said that, upon reading this forum and in particular these threads I question whether we can really classify ourselves as an intelligent species).
Given the universe is impossibly huge, with millions upon millions of galaxies out there, each containing millions upon millions of planets, suns and stars within each of these galaxies - by sheer weight of numbers, and drawing upon the fact we ourselves exist, it shows that life is sustainable. Among those trillions upon trillions of planets and stars there is likely planets like ours with similar atmospheric conditions, which could sustain life. And that is only for life forms similar to our own - there could be other kinds of life.
I suspect we will never confirm this in our lifetime (as in whether there is life out there) - but the chances that there is is much much higher than the fairytale stories in the bible being true. Or that there is some all-knowing omnipresent god that created all of this.
As the chance that this imaginary god is real is 0%, the theory that we were seeded is higher than 0% given the above, therefore it is more likely. Personally I don't believe in either theory (alien plant or god).
Or cynically I could just use your arguments for the existence of god and say I know this and you'll just have to believe me because I have faith.
i did start a thread with a poll re the god v advanced alien entity question a while ago (advanced alien entity won) which was merged with the god question thread by a mod, and my argument was the same ie. the numbers/probabilities and the mere fact that we exist confirms the hypothesis IMO.