You are correct Manuel. You are talking about a first cause. My point is that the first cause has been talked about for thousands of years. All talk and no action; after all of that time, no one, including you, has ever even succeeded in producing a logical demonstration that such a cause even exists, much less identified what it is.
The problem is, that deductive logic, the only type known to be capable of producing *certain* conclusions, given a starting premise, cannot be used to prove the premise. Hence, all "well reasoned" logical arguments, can only be demonstrated to be wrong or questionable, by demonstrating that the premise is false or dubious. Your starting premise, namely that a first cause exists, has been shown to be dubious; it cannot be shown to be true and it cannot be shown to be false - it is thus rendered dubious.
You stated that "You are correct Rob, if and only if, they exist in the first place" . That is indeed true, but it is just the Anthropic principle. All it really says is that something, your car key, can exist if and only if whatever was necessary for it to exist also existed. It is logically possible for there to be an infinite regression of such things, and thus no "first". It is also logically possible for there to a a circular chain of causes, rather than a linear one, so again, there is no "first", there is just an endless cycle. And that, of course, is why it is possible to debate the "first cause" in an endless cycle. Consequently, we do not need to agree to disagree, in order to break-out of this cycle. We only need to agree to break-out. Which is exactly my point. We do *not* need to directly select a "cause" or "reason" for the break-out, such as agreeing to disagree. We only have to directly select the break-out itself.
I shall.
Rob McEachern