If there were prior observed cases, then it certainly wouldn't be thought to be impossible. Instead it's just that theory can't yet explain how. In the same wa

If there were prior observed cases, then it certainly wouldn't be thought to be impossible. Instead it's just that theory can't yet explain how. In the same way that it is, or was, ludicrous when people say it's impossible that bumble bees can fly, when clearly they can. Instead our understanding of their flight mechanics was incomplete.