 This theorem is true for any two operators. However, there is a way that I can write commutator of two conformal fields as their expectation value. This is something which I didn't do for you and that is, it has to remain. Yes, so it is expectation of this guy, expectation of this guy, and if this commutes with that I can write it like this, and this is just a constant, something. Yeah, this is just, for example, I2 alpha phi of z plus phi of w. That will be a constant. Now, any operator, if you have, for example, phi, expectation of that is equal to 1 plus phi, then this second term is at the same point. It is not at different points. Okay, well it's one operator. It is one operator. It's not two operators. So this has to be just one constant. It cannot be anything but a constant. I can, for example, shift them and get it to the origin or something. It will vanish. Okay, let's go home. I would do something with this. I would do something with this.