Chuck 8 yrs old- Half Full? Half Empty?

Chuck 8 yrs old made a brilliant observation or so I thought. Ya know how we hear people talk about how they believe people who say half full are optimists and half empty are pessimists? Well my nephew Chuck thinks we make too much of this. He said, "Ya know I do not really think it is that big of a deal because it is like this. If you fill a glass and drink half of it, it is then half empty, but if you fill it up only half way it is half full!"

Is that not genius?