there are reasons why we behave as we do, reasons we believe what we do, and reasons other people should believe us... and these aren't necessarily the same
we tend to not mention the computational complexity or energy cost of calculating what to believe because these are not valid reasons for others to believe our claim is true, but they are certainly significant factors in why we believe what we do
an imbalance in the cost of mistakes can give rise to adaptive biases- better to be safe than sorry- particularly when reaction time matters... we flinch even if there's shatterproof glass between us and flying debris