Related to that, Buddy Hackett was given bluff answers to questions, but never the question. Buddy would actually do research because he wanted to give the right answers. This got him into a little trouble, because during a series of tapings, he was giving a lot of right answers. There was a question about what country had the most doctors per capita, and he quipped "It's got to be the country with the most Jews... it's got to be Isreal."... he was right! After the show, Buddy was called from his square and questioned by producers, and in that same episode, his square is noticeably vacant during the end credits.
When Cliff Arquette came back after recovering from a stroke, he was missing answers to questions about history, which was unusual, because he was a history expert. To not make him look bad, they decided to give Cliff the right answers to some questions.