Well, if one ascribes to this God thing, of course Earth could just as well be created 6000 years ago, with exactly the shape and vintage material properties to appear to us as it does now.
If you can create a baby Earth from nothing, you can also just create a middle-aged Earth from nothing.
Like seriously, every creationist who goes with this argument really compromises on the benevolence leg of our understanding of God. Like God is some kind of trickster being who leads atheists astray on purpose or something.
All in all, it IMO just sets up the importance of the Council of Nicaea as well as the development of the Nicene creed.
For the curious, that number is largely arrived at by working backward through time using the reported ages of the Old Testament prophets going back to Adam in the book of Genesis.
This is one of the worst arguments against young earth creationism. You have to posit a being who can create the universe, but can't create already decayed elements.
An omnipotent creator that creates lies? What else should we disbelieve from that Prince of Lies? How can we tell that now that invisible sky daddy is telling the truth this time? What about last time? Are we going to see some giant PSYCH! written in the sky?
It's not even a proper argument if you think about it, because you are essentially positing logic/reasoning aren't sufficient to comprehend the reality we live in.
Why? The book itself gives no reasoning or exact age for when Earth started, yet we have to believe it is fact that someone misreading that book has the exact pure date?
Young earth creationism is predicated on the idea that every word in the Bible is literal fact (no exceptions), so you can “calculate” the age of the earth by the genealogy accounts of ancestry from Adam to Jesus. It falls apart at any reasonable scrutiny, but like you said, it’s not rational thinking. It’s dogma for a certain group of people.
And yet if you ask many a young earth creationist about the dome in the heavens separating the waters above from the waters below, they will have no idea what you’re talking about¹ because they insist on literal interpretations of a text that they didn’t make it through the first page of.
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1. Based on firsthand experience.
Not such a good argument either. They're way ahead of you: "The lord moves in mysterious ways" and all that.
Others will come up with reasons why those things aren't actually what they appear to be, including but not limited to the ones who declare the entire scientific establishment to be a grand conspiracy to discredit the One True Faith.
Still others will just breeze on past it, ignoring things that they cannot understand.
Ahem, 6000 years, approximately.
> around 6 pm on 22 October 4004 BC, per the proleptic Julian calendar.
While the Gregorian calendar was in use for about 70 years by the time of his "calculation" of the age of the Earth, the Gregorian calendar was a Catholic invention and Ussher was very Protestant.
https://en.wikipedia.org/wiki/James_Ussher
Physical evident strongly supports the 13-ish billion year age. Radioactive decay shows that a young earth could not exist, as there would be lots of short-lived primordial radioactive isotopes. Instead, the only primordial radioactives are those with very long half-lives. If there were a different rate of radioactive decay (as some YECs try to suggest), the Earth would still be a molten ball of lava/magma with no solid surface. And definately no liquid water anywhere.