No, Last Thing on My Mind seems to be known by a huge number of people, folkies or not! And probably more people know more of the total complement of words than they do of the Zoo song! Don't quite know how you're going to prove your point Tunesmith, nor I mine, so let's not start a war over it...... life's too short! Meantime Trump, etc......! Time to rake up "Buy a gun for your son" instead?