The Never Ending Pool

I can see it going either way. If we're going by any song played at a Bob Dylan concert (excepting opening acts), then it counts. If Bob comes onstage during an opening act's song, it counts. But if Bob's not singing or playing and not even onstage during a song, then it should not count. And what if Bob's backing band played an entire concert without Bob, would those songs count? I think not. Isn't this sort of the same thing? It seems he's got to be at least on stage.