New models of how ideas change make "true believers" and irrational conviction scary.
Once the networks were built, the scientists then "sprinkled" in some true believers throughout each of the networks. These people were completely set in their views and unflappable in modifying those beliefs. As those true believers began to converse with those who held the traditional belief system, the tides gradually and then very abruptly began to shift.
After ten percent of the target population had adopted the unshakeable belief, it abruptly became the majority opinion. Minority Rules: Scientists Discover Tipping Point for the Spread of....
Not exactly an accurate model of human belief, I'm afraid. Talk to to people and you're convinced? Just like that? Sorry, doesn't work that way in reality. The computer model is incredibly naive, and that the researchers are presenting this as being representative of the behaviour of actual human populations/networks, they are being irresponsible in their exaggerations.
I note that they didn't include any skeptics, critical thinkers, logical thinkers, or empirical thinkers in their model. Of course if everybody believes random shit they hear from two people, they will eventually all believe random shit. But the universe tends not to be very kind to people who truly believe random shit, and humans are too wary of social and political scheming to be so easily swayed by a couple of conversations.
Move along, move along. Nothing to see hear. ;-)