Bill Mechanic, former chairman and chief executive of 20th Century Fox Filmed Entertainment between 1996 and 2000, said: "For marketing purposes, a 'two thumbs up' was great to have." Ebert, who stopped appearing in "At the Movies" after medical issues robbed him of his voice in 2006, exercises the sole right to use his thumb for rating purposes; Siskel died in 1999.
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