I had thought, though (and I confess that it's been a while since I first became aware of the See BS marble promotion system), that when you became an anchor, you received a new bag of marbles.
As anchor, everytime you aired an inaccurate, biased, and factually-slanted story designed to defame or slander a Republican President, Senator, or Governor, See BS took one of the marbles from your bag, and gave you instead a picture of an old bag -- someone like Helen Thomas.
It's clear to me that Dan Rather a long time ago lost all of the marbles See BS gave him when he became anchor.
His current state of dementia, I think, can only be attributed to having a collection of pictures of a variety of old bags.