Stephen and the not good cat

Stephen tried to explain the difference between a good cat and a bad cat who beat him and scratched him. The bad cat is "not a good cat" and the good cat is "not a not good cat". I think Stephen will be able to study mathematics and logic :-)

There is also cookie monster. Cookie monster is my right hand which tickles him from time to time. Sometimes, I asked Stephen "where is cookie monster" and he replied "Shut, cookie monster is sleeping". Whenever he screams, cookie monster wakes up and tickles him.