Display rate, rendering rate, and persistence

A good way to see the high-persistence blur he's talking about: physically move a tablet screen up and down while reading a line of text. Do it just slow enough that you can track it and there is no blur. Now start over and scroll the screen at the same speed and direction you were physically moving it before, and try and read the same line. You should see much more blur.

1) CRTs had a "high" persistence

2) I have a low motion fusion freq. I can feel that something is moving at rates of 15 Hz (Ja! I played Rebel Assault at 15 fps, and DooM 3 on a Geforce 2MX were the fps drops to 15 many times.)