"Well how would you qualify said authors on the chance they did?"
I used the word "supposedly". I'm allowing for them knowing the mind of God or not knowing equally. But most Believers won't budge on this at all. So when I have a discussion with them about something like homosexuality, they keep quoting the bible as if it is the beginning and end of all Truth. I'm suggesting that it might not be, that there may be more to the mind of God than the bible.
No, you're not. Saying it and doing it are not the same thing.
How can I prove this? Easy?
If indeed you were "suggesting that it might not be, that there may be more to the mind of God than the bible," you'd have some definable set of circumstances to conclude there is indeed nothing else in the mind of G-d, and that this set does not fulfill it.
Without that, all you're doing is attempting to undermine the veracity of the other person's philosophical premise. You're not showing any faults, you're just trying to get them to accept YOUR question mark instead of THEIR period. Without a reason to do so, there's no reason to do so.
So, God flip flops? When God called that type of behavior an abomination, he didn't mean it?