By 2040 we will be able to upload our brains ...

You don’t have to believe in gravity or in quarks in order for both to fully define your very existence. So feel free to believe how you choose.<blockquote>“People can argue about it,” says Kurzweil, relaxed as ever within his aura of certainty. “But when it comes down to accepting each step along the way, it’s done really without much debate.” </blockquote>