Suppose we are generally indifferent about Coke or Pepsi, but we have slightly better past experiences with Coke. That little bit of edge becomes amplified when we are stressed, increasing the likelihood that we will go with our favorite. This is an adaptive mechanism that helps our brain make a tough choice under pressure. If running and fighting are relatively similar in their potential value, but one has a slight advantage over the other, this mechanism helps make sure we pick our best possible option, even when our conscious mind would say, “Ah, whatever.” This means that when we are in a
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