A Fit

 with other pieces of the puzzle.  You need a lot of pieces that fit to get a clear picture of what you have.  That is why you start with the big pieces.  Little pieces are way too easy to find and they will always fit your interpretation especially in the future.  So there is no proof.  Just historical pieces that seem to fit a literal interpretation.   More pieces are better. 
Watch for more pieces that fit.  Blessed is the one who looks.
Home