The scientific evidence is overwhelming, too numerous to quote here, you've got to kidding. Or totally callous about the fate of our children to deny it. Or incredibly ignorant.

How much money you want to spend is another matter. I would understand if you say "I don't want to spend money on it". That's the beginning of a discussion.

But to say there is no scientific evidence at all is the equivalent of trying to sell snake oil even as your head is buried in the sand. Sorry, not buying it.