"I've never been impulsive. It's always been in my nature to consider things carefully and then decide upon the best solution. Except, sometimes the circumstances change. Sometimes things get so complicated and so bad that your nature just doesn't matter anymore."

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Human attention, in the best of circumstances, is a fluid but fragile entity. Beyond a certain threshold, the more that is asked of it, the less well it performs. When this happens in a psychological experiment, it is interesting. When it happens in traffic, it can be fatal.

— Tom Vanderbilt