Learn in the textbookPrecision, Bias, and Various Biases
DefinitionCognitive bias (認知バイアス) is a skew in which thinking habits such as assumptions and preconceptions bend judgment and interpretation away from what is rational.
ExplanationIt works unconsciously, so people rarely notice that their own judgment is off. When reading analysis results, looking for data that supports the opposite conclusion and checking with several people reduces its effect.
AnalogyThrough tinted glasses, the same scenery looks a different color. The person wearing them gets used to the tint and stops noticing it.