Noise and Signal — Nassim Taleb

From Farnam Street:

When consuming information, we strive for more signal and less noise. Intuitively we feel like the more information we consume the more signal we receive. While this is probably true on an absolute basis, Nassim Taleb argues in this excerpt from his forthcoming book, Antifragile, that it is not true on a relative basis. He contends that as you consume more data, and the ratio of noise to signal increases, the less you know what’s going on and the more inadvertent trouble you are likely to cause.

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The Institutionalization Of Neuroticism
Imagine someone of the type we call neurotic in common parlance. He is wiry, looks contorted, and speaks with an uneven voice. His necks moves around when he tries to express himself. When he has a small pimple his first reaction is to assume that it is cancerous, that the cancer is of the lethal type, and that it has already spread. His hypochondria is not just in the medical department: he incurs a small setback in business and reacts as if bankruptcy were both near and certain. In the office, he is tuned to every single possible detail, systematically transforming every molehill into a mountain. The last thing you want in life is to be in the same car with him when stuck in traffic on your way to an important appointment. The expression overreact was designed with him in mind: he does not have reactions, just overreactions.

Compare him to someone with the opposite temperament, imperturbable, with the calm under fire that is considered necessary to become a leader, military commander or a mafia godfather. Usually unruffled and immune to small information —they can impress you with their self-control in difficult circumstances. For a sample of a composed, call and pondered voice, listen to interviews of “Sammy the Bull” Salvatore Gravano who was involved in the murder of nineteen people (all competing mobsters). He speaks with minimal effort. In the rare situations when he is angry, unlike with the neurotic fellow, everyone knows it and takes it seriously.

The supply of information to which we are exposed under modernity is transforming humans from the equable second fellow to the neurotic first. For the purpose of our discussion, the second fellow only reacts to real information, the first largely to noise. The difference between the two fellows will show us the difference between noise and signal. Noise is what you are supposed to ignore; signal what you need to heed....MORE