Yeah, but I have no excuse.
I have a couple of books which together contain the lyrics for just about every song the Grateful Dead ever played, even the ones they only ever played once or twice. There are also several web sites deadicated to nothing but GD lyrics. Plus, I just heard Furthur play the song on a CD in my vehicle a couple of days ago.
I could have looked it up, but I relied solely on my increasingly defective brain...