Which is a point I have already conceded. That is why I don't consider it irrational to believe that other intelligent life may not exist. There is no evidence to judge the likeliness of the conditions, so one can choose as they wish until more evidence is available.
We are in agreement here, although you seem to be conceding your previous point about the "default" position being the only rational position when there is little or no evidence either way.
It is irrefutable supporting evidence for the possibility of life elsewhere unless you do one of two things.
Irrefutable evidence means that the conclusion must necessarily follow from the evidence. In this case, the conclusion follows from other irrefutable evidence (namely that it is not
impossible that intelligent life exists elsewhere). It can very easily be argued that the existence of intelligent life here doesn't provide evidence
at all of the
possibility of intelligent life elsewhere, but I was trying to give you the benefit of the doubt by not dismissing it entirely as evidence of possibility. However, the existence of intelligent life here is in no way
irrefutable evidence of the possibility of intelligent life elsewhere.
Claim that life on Earth emerged completely independent of events that can happen naturally, or prove that the naturally occurring events that led to the creation of the life supporting conditions on Earth are impossible to happen anywhere else.
This is exactly my point. It is possible that intelligent life exists elsewhere because it isn't impossible.
And, as I explained above, this was about whether or not this is evidence supporting the possibility, not on how probable you may think it is.
The possibility is true because there is no irrefutable evidence that it is impossible. Whatever "supporting" evidence there might be of the possibility doesn't make the possibility any more true.
You don't actually believe this nonsense you typed, do you? First, I'm not claiming either are impossible, nor arguing about what is irrational. This is about your claim that it is equally rational to believe in anything as long as it is possible, and I disagree.
That is not even close to my claim. I agree that some things are less likely than others even when both are possible. My claim is (and always has been) that in cases where there is little evidence either for or against something, it is not necessarily irrational to hold an opinion either for or against it.
You admitted that this is true of the existence of intelligent life outside of the solar system. However, you claim that there are exceptions for other things for which there is little evidence for or against.
How rational it is to believe in something that is possible is directly related to the quality of evidence supporting the possibility, among other things, such as what is must be contradicted by believing in it.
The quality of evidence supporting the possibility of anything for which there is no proof of impossibility is irrefutable. The evidence is simply that there is no proof of its impossibility. If there is proof of impossibility, it would not be possible. In other words, something is possible if it isn't impossible. That is simply a fact, and cannot be any more or less true than "true."
In the case of life elsewhere in the universe, aside from the "evidence" that we can't prove it impossible, we have evidence that life has occurred at least once and no logical reason to conclude it is impossible to happen more than once. That is empirical evidence supporting the possibility.
Again, its possibility is entirely true without any additional evidence. That there is "empirical evidence supporting the possibility" doesn't make it any more true.
In the case of God existing, we have the "evidence" that we can't prove it impossible, and that is it. Absolutely nothing else.
Therefore, it is true that it is possible. Period. Any additional evidence will not make it any truer.
Therefore, your analogy that it is equally rational to believe God exists as it is to believe life exists elsewhere is wrong.
The
possibility of each existing is true. The fact that there is little to no evidence of either
actually existing precludes it from being necessarily irrational to have an opinion for or against the existence of either one.
-Bri