information. We use, instead, only a single, highly representative piece of the total. An isolated piece of information, even though it normally counsels us correctly, can lead us to clearly stupid mistakes-mistakes that, when exploited by clever others, leave us looking silly or worse. At the same time, a complicating companion theme has been present through- out this book: Despite the susceptibility to stupid decisions that accompanies a re- liance on a single feature of the available data, the pace of modern life demands that we frequently use this shortcut. Recall that early in Chapter 1, we compared this shortcut to the automatic responding of lower animals, whose elaborate behavior patterns could be triggered by the presence of a lone stimulus feature-a cheep- cheep sound, a shade of red breast feather, or a specific sequence of light flashes.
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