Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.
“If you prick us do we not bleed? If you tickle us do we not laugh? If you poison us do we not die? And if you wrong us shall we not revenge?”
“My children - in many dimensions they're as poorly behaved as many other children, but at least on this dimension I've got my kids brainwashed: You don't use Google, and you don't use an iPod.”