I personally think most of us know the truth about most of the things, we care about.In reality, some of us push those truths to the back of our minds and in that way try to avoid dealing with a harsh reality.
If we are reasonably astute and observant,we usually know things such as, is my partner being unfaithful,are my kids up to no good.Some choose to ignore those "gut instincts" or the truth.
I would much rather know,mainly because if I think I know, then I cannot completely banish the thought.Therefore all I am doing is prolonging the agony.
There is only one area where I am quite happy to be lied to and that is ,when I ask my husband if He likes my hair, dress, figure etc the universal and only acceptable answer is YES !!!
If I ask him if he thinks I am looking older, bigger, more wrinkled,the reply is NO !!