Now, here’s the mother of paradoxes on this subject.
Imagine, you are listening to the radio and a blues track comes on, and you are immediately held by the terrific singing. It almost sounds like a cross between B. B. King and Bobby Bland on their best day. You think to yourself, “ That’s got to be one of the greatest blues voices ever”.
    The track ends, and the DJ says, “ That’s a track off an album by a new band from Scotland, and, listen to this! The lead singer is only 19 yrs old and comes from Glasgow”.   
    “Scotland?”, you say to yourself, “ And, only 19! I’d would have swore that the singer was black, and from the States”.
    Now, knowing that the singer is from Scotland, and singing in an American accent, would you still rate the vocalist as, “one of the greatest blues voices ever”? Or simply dismiss the effort as being like the equivalent of a superior tribute band.
    In other words, can we make a true value judgement on any piece of art ( music, painting, literature ) without having all the information to hand about how - and by whom - the thing was created?