Our brains present us with a view that is the best-calibrated to improve our evolutionary fitness rather than the most accurate. Being ignorant about your own motivations may pay off in evolutionary terms: it is an inarguable truth that evolution cares about fitness rather than objectivity, and if the ability to present oneself in a good light has certain reproductive advantages, then it will be prioritised. I suspect that we can’t overcome these tendencies, and I am not sure that we would even want to, since life would be unrecognisable – and possibly intolerable – without them. But if we are
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