Religion
In reply to the discussion: Would Finding Alien Life Change Religious Philosophies? [View all]BillZBubb
(10,650 posts)If you make the claim that life does or has existed on other planets the total onus is on you to prove existence--it is not on me to prove non-existence. I am not saying life is unique to earth, what I am saying is that is all we can say for certain given the evidence on hand. Notice the difference?
We may find evidence later, but we don't have it now. So that line of reasoning falls short as supporting evidence.
As for your probability argument, it is entirely unpersuasive. We simply do not know, at this time, that even given the materials required for life what exact conditions and sequence of events is required for life to arise. There may be 10 to the 10th (just a random big number) planets with the basic materials for life, but the necessary sequence of events and conditions may only occur once every 10 to the 20th years. We simply don't know.
My guess is that life does pop up from time to time in other places. How common it is, I couldn't say. But that isn't based on any more than a hunch.