But then Visions of Johanna is Joan too, as perhaps is Positively Fourth Street (if it isn't Phil Ochs). So it depends how Bob was feeling about her on the day.

Now, as for a duet where Bob & Joan can try and speak for themselves, then let's try this one. I can't work out the vintage on that. It looks like it might be from their last tour together in the early 80s, or possibly it is from around the time of Hard Rain. Doesn't look like Rolling Thunder Revue footage anyway.

Blowin' In The Wind