They say, with age, comes wisdom. It can, but the process isn't automatic. Discrimination is called for and that's tricky because we might assume that as we grow older, we have less need to repeat the mistakes of our youth. Yet for all that we are entitled to draw on hard-won experience, we must also  take care not to become entrenched in unfounded beliefs that we have allowed ourselves to uphold without question for too long. Don't dismiss, as 'proven beyond doubt' the case on which the jury is still out.