But seriously,
We know by observation of solid facts that the universe as we know it, and the planet on which we reside, are both much older than 6,000 years. These facts are more than iffy hypotheses, or error-prone calculations on carbon decay. Cramming the age of the universe into 6,000 years requires adherence to pseudoscience and violations of standards of plain and decent horse sense that young earth creationists vehemently appeal to in their own attempts to strike down the beliefs of others.
But frankly, this has very little to do with the Bible. Usages of the word "earth" in the KJV and other English translations of Scripture are not only completely different from today's global definition of the word, but are not even consistent with Hebrew terminology. In the Bible, we've used the word "earth" to translate more than one word, and a number of concepts...and that's on the side of concrete literalism.
Furthermore,
Genesis 1 does not place the Earth at the beginning of all existence (that's not even in the scope or realm of thought for the work), neither does
Genesis 3 place Adam at the beginning of all people. These are assumptions that we have made from our English words, and then we've tried to squeeze them into the Scripture with gap theories and more assumptions.
A dogmatic slogan of young earth creationism is the question of whether or not we are going to believe the Bible, or our own observations. My question for young earth creationists is whether they are going to believe the Bible, or their own sacred cows born and nurtured from anachronistic derivations of tiny fragments of Scripture.