Come on, there's hundreds of trillions of them -- trillions of trillions of trillions of them -- how are we supposed to believe there's no two snowflakes alike when no one has checked them that closely?
We need a massive FBI-like database, with each snowflake carefully scanned. Then we'll run them all through one of those Google Picasa face recognition programs -- retooled to make it a snowflake recognition program -- and find out once and for all what the truth is about snowflakes and their supposed inherent dissimilarity.
Because I for one don't believe it. And I'm calling them out on it! Put up or shut up.