Whichever of them, Broonzy or Satch, originated the 'horse' argument, it has become a bit of folklore in its own right. I agree with Bert Lloyd, however, who always described it as "a dreary axiom". Mauvepink, my dear, have you ever seen a horse in a black tutu perform 32 fouettés? No? Ah, then; so Swan Lake is a folk dance, is it?

Oh, come on...

~Michael~