What we call 'morality' is a statistical bundle of empathic consensual behaviors which may have evolutionary advantages for species or group survival. — fresco

Ok, so what of our conscience...?

It's easy to point to a person who has "lost their minds", and not so easy to ask yourself, "have I lost my mind?". — Wheatley

Tell me, how would you then define a perfectly sound mind? Assuming it is so easy to spot which minds in the crowd have been lost, the opposite effect by this logic must be equally true.