I was cleaning the flat today. When I finished, it was not spotless (I am well-balanced: equally useless and lazy), but it was cleaner than before. I think. Mom's visiting tomorrow. She would think that I live in a pigsty even if I lived in a cleanroom. But it is a pity that she will not know how dirty it was before. This often happens when we form an opinion: we normally lack some information and hence make huge misjudgements.