it's pretty disturbing that this is even being debated. I mean, really very disturbing. No wonder society is lagging far behind scientific understanding when it comes to things like the environment and current technological possibilities. What next? A debate on whether the world is flat? On whether the Earth revolves around the sun or not?
The science used to determine the age of the earth, is the very same science that was behind the atomic bomb, for example. If they were wrong about the age of the earth, then the atomic bomb would never have worked. However, it did, because, funnily enough, science actually works. It's not guesswork based on some interpretation of some book a few blokes wrote about some guy that most likely never even existed. It's based on observation and repeatable experimentation.
The Earth is 4.54 billion years old. This has been known for over 60 years now. Come on people.