And in fact, what confirmations are there are three dimensional structures related to one another by sigma bond rotations. For example, here I have one confirmation. If I rotate this bond some given amount of degrees, I will have a second type of confirmation. So these two molecules are related to one another by the fact that they're rotated some amount of degrees about this carbon carbon bond. And these guys are also known as confirmers. Now, there are many different types of conference that exist, right?