An anchor problem is a real problem, just a hard one. It’s actionable—but we’ve been stuck on it so long or so often that it seems insurmountable (which is why such a problem has to be reframed, then opened up with new ideas, then knocked down to size by prototyping). Gravity problems aren’t actually problems. They’re circumstances that you can do nothing to change. There is no solution to a gravity problem—only acceptance and redirection.