I beleive the bible has alot of facts and alot of allegories. Was Jonah really in the belly of a whale for 3 days or could that be any situation a person finds themselves in after a plane crash, or adrift at sea, or surviving in a stranded car in sub zero temps, any situation where you're previously "in control" life suddenly isnt and you have no choice but to reach out to God. I believe Jesus came back from the dead, I think everyone needs to start there and ask themselves whether he did or didnt, and then work backwards as to whether they believe various miracles or judgements from God.