"I'm assuming my conclusion that the earth is immobile to show that the earth is immobile." --Dave
You still don't get it, do you?
RELATIVE TO EVERYTHING ELSE, THE EARTH IS MOVING.
Which makes your argument self-contradictory.
You can't have a moving immovable object.
This is why using Wikipedia is a bad idea.
The earth is ONLY 7-10,000 years old. It CANNOT be older, if the Bible has anything to say about it.
The point is that Flat Earth-ism is recent (think mid-19th century recent), and that as early as the 6th century BC, the earth has been established as a globe. To assert that prior to that the earth was assumed or believed to be flat would be presenting a false dichotomy. In other words, you leave out the possibilities that the shape of the earth was either not known prior, or that it didn't really matter to anyone, or that it
was known, but never recorded, or was recorded, but such record has been lost to history or simply hasn't been discovered yet. We simply don't have enough information to make any claims as to what the ancients (or at least, those prior to the 6th century BC) believed, so you should stop making such claims.
In any event, Isaiah's words, when you consider their actual meaning, are far more consistent with a globe than a flat earth:
It is He who sits
above the circle of the earth, And its inhabitants are like grasshoppers, Who stretches out the heavens like a curtain, And spreads them out like a tent to dwell in. - Isaiah 40:22
http://www.biblegateway.com/passage/?search=Isaiah40:22&version=NKJV
https://creation.com/isaiah-40-22-circle-sphere
In addition, the oldest book in the Bible, most likely written by Moses, describes the earth in a manner consistent with modern cosmology:
He stretches out the north over empty space;
He hangs the earth on nothing. - Job 26:7
http://www.biblegateway.com/passage/?search=Job26:7&version=NKJV