A few years ago I was searching for a movie review.  I knew Rotten Tomatoes would provide me with a database of dozens of reviews so I began my search there.  While scanning through the Top Critics reviews I recognized very few names.  One name I did recognize: Roger Ebert.  I remembered Mr. Ebert and the late Gene Siskel liked to grade films by giving them thumbs up or down.  When I clicked on his...