Necessary Thing

[Ignorant]

Can you keep on going, indefinitely? Maybe you can. Maybe reality is like a fractal. Again, I don't think you can rule this out.

Sure, if it is true that "some things exist on the condition that other things exist synchronously", then it is EITHER true that (1) ALL things exist on the condition that other things exist synchronously (e.g. like a fractal), <OR> that (2) SOME things exist without condition. Both cannot be true at the same time. <= Would you agree so far?

In order to know which of the 2 propositions is true, we need more information, some other true premise.

Let's say item A1 has a corresponding object A2 in a parallel reality or something; and if object A2 were to be destroyed, this would cause object A1 to also be destroyed. So even if it's not dependent on anything in the manner you describe, we can't rule out some sort of weird dependency like this.

Of course we can't rule out this sort of dependency (in fact, I don't see how/where I have), but then, A1 would still be dependent, whether or not our observations "validate" that conclusion or not. A1 would still fall in the subset of things which exist on the condition that other things exist synchronously (e.g. A2 in the parallel reality). Is that sort of conditional existence possible? Of course, but now we've just kicked the can into the parallel reality. Does A2 exist conditionally or not? Those sorts of possibilities are assumed within the concept of "condition" or "contingency".

We have no reason to necessarily rule it in, either. But if you're making general statements of fact, you need to be able to exclude all alternatives with certainty. Science doesn't ever deal with certainty, because it's not a useful concept. It deals with conclusions that appear to be true beyond reasonable doubt.

Sure, and I like that you said, "exclude", because that is exactly what I've done, at least I think so. I considered the possibility that ALL things exist conditionally. My consideration of the proposition is what you take issue with, which is why I intend to start a new thread at some point about just that topic.

But if that proposition is indeed false, then logic leaves no room for anything but the alternative being true => Some things exist without condition.