Muddiest Point from Sept. 16 Class

There wasn't too much from the lecture or assignments that I am confused on- so my muddiest point isn't going to relate directly to the class but to the readings that we were assigned. It sucks that links get broken, but I am hoping that we can go over more of what the third reading was trying to explain about database normalization. I got lost without the pictures and the layout of text made it confusing to follow the narrative.