I think that you miss the point of Last-Thursdayism. You see, if God created the universe less than 10,000 years ago, consistent with a literal reading of the Bible, then it appears as if God has made the universe in such a way as to make us think that it is older than it is. The evidence of geology, biology and cosmology all lead us to believe that the earth, live and the universe are all orders of magnitude older than the biblical claim.
Wrong. Isaiah 64:16, "For I the Lord have created the destroyer to work havoc..." God knows that man won't believe him and instead, make up their own stories of creation. God told us very clearly that He created the universe, how long it took Him to do so, that he created it out of water and by water, how He created man, the animals and all living things.
But man in his pride (which was the first sin, by the way) thinks he knows better than God. So he makes up his own stories, which have changed with the seasons all throughout history) and in most cases, comes up with more bizarre and impossible conclusions than anything in the bible!that's why old theories are discarded and replaced with new ones every century.
God
established the length of day and night by when the sun sets and rises. He established the time line of the sun by the rotation of the earth and how it revolves around the sun. He thus established the 7 day week and the 12 month year.
He also created man out of the dust of the ground which is why our flesh and bones decay back into dust when we die. He also created us to re-produce which means that each animal and human producers
itself, not another species. And he gave men dominion over the animals.
That's
exactly the way the world works. Animals do
not breed human descendants in reality nor do they turn into humans. So if you want proof of God, all you have to do is take your blinders off and look at reality. His existence is plain as day in
everything around you. That's why Romans 1:18-20 tells us that we have
no excuse for denying the existence of God. So there's no reason to make up new impossible stories of creation when creation itself proves God's existence. Absolutely none.