I don't agree with Timmy's conclusions, but what I appreciate about Him is since he has chosen not to believe the Bible, he doens't "have a dog in the fight" and He simply bears witness to what the Bible says.
The Bible plainly teaches a flood in which all of the human race were wiped out but 8 people. It is not allegorical, and nothing in the Bible hints at it as allegorical.
Just tryin' to help!
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Hebrews 13:23 Know ye that our brother Timothy is set at liberty