How can you prove something real that has no concrete evidence......the Bible is flawed and therefore not concrete.
We have photo's,video's,cast footprints,hair samples and there is still people out there who are convinced Sasquatch is not real. The evidence brought forward for Sasquatch's existence far outweighs that of evidence for Jesus and God,still people think Sasquatch is a myth.
It is true that the book has flaws and that bible God likely does not exist but we can still analyse what is written from a moral POV and give our verdict as to what is written while ignoring the reality that God does not exist.
We can also pull the morals out of Mother Goose while knowing it is a fairy tale.
Who is it that said something like, men of intelligence can discuss things they do not believe in.