No - it's not that the proposed altered number are "invalid" - it's that they are all thrown off by the exact same amount, even though the different methods are unrelated.
Like what? Carbon dating, dendrochronology, speleotherms, varves, ice cores and more have all been validated by written historical records, such as when a church with wooden pews with the date carved on them is tested, or the date that history records give as the date a city burned is seen in the varves.
All of those methods and more confirm obsidian hydration, Pb-K dating, magnetic polarization, electron spin dating, and more. Each of those confirms a half dozen other methods, stretching back 4.6 billion years.
Now, what variable are you proposing that would throw off the fact that tree rings form every year, that spring runoff happens in the spring, that uranium atoms decay at a certain rate, that electrons change their spin at a certain rate, that humans write down historical dates, that oxygen diffuses through silica at given rate, that magnetic material lines up along a magnetic field, and more?
What are you proposing that won't just throw these off, but throw each one off in exactly the right amount to make it match all the other "incorrect" dates? Oh, and of course that factor will have to make humans record all their historical dates in their history book by again - the exact same incorrect amount. 5
What I'm saying is this:
If you want to measure something with a new method of measure, you must have a standard, a known standard of the unit you are measuring with...
If you want to measure temperature, you cannot say "Hey, I made this thermometer and it says this water is 1000 degrees..... when you have never calibrated the thermometer with a liquid of known temperature. Even if the water was 90 degrees and your new thermometer said 93 degrees.... by the time you reach out to millions of degrees.... your thermometer is no longer any use.
All measuring devices need to be calibrated. We have absolutely nothing that is solid concrete fact of being certified as being even10,000 years old. Everything that is old is a speculated date. There is no way we can accurately measure the age of something and state it is in the thousands or millions of billions of years old. Any tiny error would be magnified immensely.... if we were even able to state that it was close to being accurate in the first place.
Dating rocks is speculation at best, wishful thinking more likely.
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