Has anybody calculated it out? Seems to me I've read that genetic experiments with insects, such as with fruit flies, produce changes quite rapidly. Also there would have been more potential for change back then, more genetic possibilities.
they do change very fast, do you know why? because they use radiation on them, and change the genes directly, its forced mutation to test how genes change, this has little to do with evolution outside a lab
i think its faulty reasoning to use this as an exaple, and you have no evidence that there was more "potential" for change back then, if there was there would be something to show this
As for your ad hoc explanation and mine, the one to be chosen is the one that fits with the Bible. Yours doesn't. Mine may not either, but that's the idea anywayh.
so it comes down not to factual truth with evidence, but does it fit the bible, why bother faith? why do you need to "proove" the bible true? its not a science book, its a religious text, it doens't really sound like your faith lies with god, but more with a three thousand year-old book that reflects the beliefs of the hebrews.
if you trusted god, you would agree that the earth which he created shows the book wrong