Okay, so I understand how to use both, but really what is the point other than semantics? I mean, what negative effect would it have if I created a class for a single, unique, element and only used it on that element? 

Also, I know you can assign only certain elements to be effected by a class, for instance:

```
p.class{blazziblazzi}

```

Now, only the element 'p' will be effect by that class, if that element is assigned to that class. So why would anybody ever assign that class to an element if they didn't want that element to take on the attributes of that class? 

I just don't get why they even made ID and Class separate, it seems pointless to me.

Any pointers would help, thanks!