I only saw one or two episodes of “The Cosby Show”, but he HAS to be a better actor than the guy who played Theo. He and Demond Wilson were two of the worst actors I had ever seen in a major role. Worst for child actor is between “Richie” on Dick Van Dyke, and the two youngest kids in “The Partridge Family” (with two different kids playing the drummer, and nobody noticing the changeover).
And then there was the faggy little brother on "Who's The Boss?"
You just knew that kid wasn't going to be straight when he grew up.