I was told this by the District Attorney who questioned me, in the process of investigating a guy who was found guilty of being a sexual predator and raping at least two girls under the age of ten year old. I was concerned that I did not know the answers to each and every question she asked. She said she was always suspect of people who remembered everything about an event. To her, it raised the possibility that it was rehearsed and part of a conspiracy to mislead the court. She said that she was never wrong in this assessment. I answered the important parts of what they needed to know to put the rapist at the point of time and vicinity of the events. I am sorry that you find this to be dumb.