In the pursuit of truth and fairness, we shall continuously evolve, otherwise our principles and rules may become irrelevant with the passage of time, or may not remain that fair as they should be.
Like everyone else, we’re subject to cognitive bias, a limitation in our thinking brought about by errors of memory, miscalculation or social attribution. Not all biases are negative, however. The placebo effect, for example, is important in the search for new medicines. This cognitive bias can be so powerful that by simply telling a patient a new drug will make them better, they begin to believe it.