It happened again. I was watching a friend finish a doubles match, going down in a blizzard of UEs to a lower-rated team. Today, we talked about the match. Yes, you guessed it. Her own take on how well/poorly she was playing bore little resemblance to the truth as I saw it, and her take on what was wrong and how to fix it was way off the mark. Are tennis players unusual in this way? I was thinking back to my days of trying to learn piano as an adult. I stank. I knew I stank. I knew this because the pieces I could play were simpler, I made more mistakes, I had to play more slowly, and no one was moved to tears (for the right reasons, anyway). Why is it that the piano player knows she stinks but the tennis player does not? Is the issue that tennis players have NTRP rating to validate them? In other words, does NTRP allow people to deny the truth? See, I would think it would be much easier to deny the cold, hard truth of one's lack of talent in piano playing rather than tennis. There is no objective measure of what is good in piano; there is much subjectivity. In tennis, there are all sorts of objective measures -- chiefly the score. Yet Tennis Skillz Denial is a plague. How come?