In the early twentieth century, the Austrian philosopher Sir Karl Popper wrote that the nature of scientific thought was such that one could never truly verify scientific theories; the only way to test the validity of any particular theory was to prove it wrong, a process he labeled falsification. This idea made its way into cognitive science with the observation that most people are actually quite bad at falsification—not just in science but in daily life. When testing a theory, however large or small, an individual doesn’t instinctively look for evidence that contradicts it; he looks for
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