I think what Gates suggest is something like the "web of trust" which W3C was working on as part of the semantic web. The idea is basically if I trust A and A t

I think what Gates suggest is something like the "web of trust" which W3C was working on as part of the semantic web. The idea is basically if I trust A and A trust B then I can trust news articles written by B. I'm pretty skeptical it is workable online as a technical solution. But basically this is how trust worked in the newspaper age. ("This was published in the reputable newspaper XXX")