On what basis can they do this? No human is born with a magical algorithm in their brain that can sort good ideas from bad. The only scalpels we have are those which we collect. Critical thinking must be bootstrapped. Mind viruses must be inoculated against. Just because you (eventually!) threw off your case of memetic measles, doesn't mean that everyone does. Some people die of it.
On what basis can they do this? No human is born with a magical algorithm in their brain that can sort good ideas from bad. The only scalpels we have are those which we collect. Critical thinking must be bootstrapped. Mind viruses must be inoculated against. Just because you (eventually!) threw off your case of memetic measles, doesn't mean that everyone does. Some people die of it.