"[I have] my own view about [Bob] Dylan's Nobel prize. Which is, I'm firmly in the Nay camp. I do think the award is a category error, but that's not why. Not in itself. What bothers me is the perceived status of the categories. If pop lyricists were routinely considered for the prize as are authors and poets, I'd still think it mistaken, but I wouldn't much care. But I am quite certain that Joni Mitchell and Leonard Cohen, for example, both at the very least Dylan's equals as writers, have never been in the running and never will be."
Source : "Born under Saturn: the character and conduct of artists : a documented history from antiquity to the French Revolution". Book by Margot Wittkower and Rudolf Wittkower, 1963.