Michael Scriven has long pointed out the fundamental difference between genuine professional evaluators and connoisseurs (see Evaluation Thesaurus 4th ed., pp. 91, 163, 329). He frequently cites wine tasting and art criticism as examples of the latter.
There’s nothing like a live example to illustrate important points, and this YouTube gem (entitled “Blank Canvas
Read the whole post –> The Friday Funny: The evaluation of art