The age of the Earth is determined by dating many rocks, including moon rocks and meteorites from Antarctica. All support approx. 4.6 billion years old as noted by many posting here.
No one is arguing that scientists don't estimate the universe to be 4.6 billion years old or 4.543 billion years old. I'm not arguing about the methods they used or whether they are wrong. My point has always been, we are not certain. We think we are, but I'm sure we thought that before... when the universe was thought to be 20 million years old. I don't know what tests we did back then to come up with that number but they were obviously wrong if we've now determined a different age. And as sure as we are of the methods used to come up with 4.6 billion years, those test methods could be equally as wrong. For instance, we could learn something about dark energy and dark matter, quantum mechanics or subatomic particles, that completely changes our understanding with how we measure age of things really old. I'm not claiming we will, I have no way of knowing what we might discover in the future... but I'm not some egotistical smart ass who has closed his mind to the possibility our estimates could be wrong or that we could learn something new.
Ad Infinitum fallacy. You seem to argue that we'll never know anything for sure.
Honestly why you post to threads like these is an oddity, your belief in everything is utterly nebulous and nothing is really 'known' so what's the point.
And while trying to argue 'we really will never know' you don't do a simple search to understand why scientists DO know these things.
Science doesn't draw conclusions. The very nature of science is to question what we know or think we know. The antithesis of science is a conclusion. Science cannot do anything with a conclusion, it's work is over. A conclusion requires faith, not science. The instant you profess a conclusion you are stating that you are no longer applying science and you've adopted faith in a conclusion.
We won't ever know anything for sure. We never have. We can believe we're sure. The evidence we observe can convince us that we must be right. But unless we somehow come to know all informational knowledge possible in the universe, we can't say we know for certain. The possibility still remains that we could be wrong.
Humans have this uncanny hubris. We assume that whatever Science thinks at the moment is absolute truth or fact and we'll never learn anything more. But we see all through history, this is not what happens. Science continue to ask questions. It does not draw conclusions. YOU do that... as a human being with a faith-based belief in something.