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" Before we move on, let me clarify that there is a fundamental difference between what we do and how predictable we are. When it comes to things we do-like the distances we travel, the number of e-mails we send, or the number of calls we make-we encounter power laws, which means that some individuals are significantly more active than others. They send more messages; they travel farther. This also means that out-liers are normal-we expect to have a few individuals, like Hasan, who cover hundreds or even thousands of miles on a regular basis.
But when it comes to the predictability of our actions, to our surprise power laws are replaced by Gaussians. This means that whether you limit your life to a two-mile neighborhood or drive dozens of miles each day, take a fast train to work or even commute via airplane, you are just as predictable as everyone else. And once Gaussians dominate the problem, outliers are forbidden, just as bursts are never found in Poisson's dice-driven universe. Or two-mile-tall folks ambling down the street are unheard of. Despite the many differences between us, when it came to our whereabouts we are all equally predictable, and the unforgiving law of statistics forbids the existence of individuals who somehow buck this trend. "
― Albert-László Barabási , Bursts: The Hidden Pattern Behind Everything We Do
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" There is an old debate," Erdos liked to say, "about whether you create mathematics or just discover it. In other words, are the truths already there, even if we don't yet know them?" Erdos had a clear answer to this question: Mathematical truths are there among the list of absolute truths, and we just rediscover them. Random graph theory, so elegant and simple, seemed to him to belong to the eternal truths. Yet today we know that random networks played little role in assembling our universe. Instead, nature resorted to a few fundamental laws, which will be revealed in the coming chapters. Erdos himself created mathematical truths and an alternative view of our world by developing random graph theory. Not privy to nature's laws in creating the brain and society, Erdos hazarded his best guess in assuming that God enjoys playing dice. His friend Albert Einstein, at Princeton, was convinced of the opposite: "God does not play dice with the universe. "
― Albert-László Barabási , Linked: How Everything Is Connected to Everything Else and What It Means for Business, Science, and Everyday Life
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" Hotmail enhanced its spreading rate by eliminating the adoption threshold individuals experience. First, it is free; thus you do not have to think about whether you are making a wise investment. Second, the Hotmail interface makes it very easy to sign up. In two minutes you have an account; thus there is no time investment. Third, once you sign up, every time you send an e-mail, you offer free advertisement for Hot-mail. Combine these three features, and you get a service that has a very high infection rate, a build-in mechanism to spread. Traditional marketing theories will tell you that the combination of free service, low learning path, and rapid reach through consumer marketing has put the product above the threshold, and that is why it reached everybody. Based on our new understanding of diffusion in complex networks, we now know that this is only partially correct. It is true that you have a very high rate of spread. But you have no threshold either. Products and ideas spread by being adapted by hubs, the highly connected nodes of the consumer network. "
― Albert-László Barabási , Linked: How Everything Is Connected to Everything Else and What It Means for Business, Science, and Everyday Life
