The folks over on Avodah are still debating the Mabul. One guy has just discovered that there may have been a local flood in Mesopotamia about 6000 years ago! Yippeeee! So it must all be true then. Shame that the story of Noach actually describes a global wipeout, with every living animal on a boat, and then complete repopulation of the world afterwards.
Do you know how many words Noach speaks in the Chumash? 24. That's it. Just the blessings and the curses for his sons, right at the end of the story. There is plenty of God speaking to Noach, but Noach gets no lines at all. Plus, if you would actually bother to read the epic of Gilgamesh, the paralels are striking. (Kiruv Clowns: See! Noach must be true!).
When are you guys going to get it?!
From a rational perspective, IT DIDN'T HAPPEN.
There was no boat. There were no animals. There was no Noach. There was no global wipeout. The evidence is clear. And guess what? Believing Noach existed is not actually one of the ikkarim. I just checked. Twice.
Now, if you want to claim the whole thing is a ness, and God cleaned up all the evidence and then planted false evidence just to test our emunah then fine. Go ahead.
Personally, I would say it's just as logical to claim that Zoboomafoo planted all the evidence. But if you want to have faith in a bizzarre set of miracles then go right ahead. But at least admit it's all faith. There's no reason anywhere to be found.