I'm not sure how any of these types of arguments
prove anything about the Bible. I can see how it ends up in the "accuracy/inerrancy" forum, but showing that the Edomites existed when the Bible says they did (even tho many can't even agree on that) says nothing about the truth of the Bible itself. Now proving that the Edomites (or any kingdom/tribe/enemy that may have been described as such in the history of the Israelites) never existed would definitely strike a blow to the accuracy of the Bible, arguing their existence according to the chronology of the Bible would be like arguing that since the exact dates (may) vary on when Alexander invaded ancient Persia, Darius or the Persian Empire never existed.
I know of no one who doubts that some of the truly historical accounts of the OT happened because it exists as a history of a people. However, people tend to embellish tales and impart significance to ordinary or natural events and fudge important dates (which becomes even harder when a set calendrical time cannot be established and then scholars are forced to debate specifics). It is the supernatural and larger than life tales that litter the biblical stories that people try to prove (contrary to the point of faith IMO) in order to validate their belief. But, those will probably never be proven.
On the other hand, I find the irony of using scientific dating to "prove" the Bible most delicious and I hope many more debates of this nature will continue.
Added in edit: It seems that Omnivorous and I have similar analogies...Troy and all. I promise I wasn't plagarizing.
Edited by Jaderis, : No reason given.