Isn't One the Mirror Image of Each Other?

I was just saying that I had that same experience just in the last couple of days because I was teaching a new seminar at Stanford and I didn't have my hopes up that it would be really yellow. It was it was decent, but it wasn't one of my better performances. And so I'm just dwelling on, you know, the negative errors that I made in the teach. So isn't one the mirror image of each other? Typically they do.