Memphis Blues Again.
When the Dead used to do this, we used to see who could be the first to pick out Weir's lyric flubs. Then he got a teleprompter.
the teleprompter era was actually pretty short. I thought it was mainly for Jerry, since he was so messed up. I'm not really defending Bobby, as he's famous for flubbing lines, but I have seen him do Desolation Row without a teleprompter before too. I play in a low class church band, and I look at chord sheets for every song. I can't imagine having to learn the hundreds of songs those guys played.