What makes a person a comedian?

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Watching both Mr Bean's Holiday and Blades of Glory, I can't help but to wonder what has become of talented comedians in the entertainment. Rowan's Mr. Bean makes us laugh thru his acrobatic antics in the likes of Charlie Chaplin, Harold Loylds, 3 stooges, whereas Will Farrell and John Heder's Blades of Glory relies heavily on the script for a good laugh. Looking at the latest crop of comedies on tv, scripts seem to be the key to comedic moments instead of the actors. Point in case, Two and a half men, fraser, sienfield, etc. Others called themselves stand up comedians like Chris Rocks, Ellen, throw stones at peoples religion, nationality, race, shapes, believe, etc. Will we ever going to have great and true comedians like Atkinson or Chaplin ever again?