The Hollywood Squares was an American panel game show in which two contestants play tic-tac-toe to win cash and prizes. The show piloted on NBC in 1965, and the original series debuted in 1966 on the same network. The board for the game is a 3 × 3 vertical stack of open-faced cubes, each occupied by a celebrity (Vincent Price, Jonathan Winters, Florence Henderson, Rose Marie, etc.) seated at a desk and facing the contestants. The stars are asked questions by the host, and the contestants judge the truth of their answers to gain squares in the right pattern to win the game.
Although The Hollywood Squares was a legitimate game show and not fake, the game largely acted as the background for the show's comedy in the form of joke answers (called "zingers"), often given by the stars prior to their real answer. The show's writers usually supplied the jokes. In addition, the stars were given the questions' subjects and bluff (plausible but incorrect) answers prior to the show. The show was staged in this sense, but the gameplay was not. In any case, the host would explain at the beginning of the game named Secret Square, the celebrities were briefed prior to the show to help them with bluff answers, but they otherwise heard the actual questions for the first time as they were asked on air.
In 2013, TV Guide ranked it at No. 7 in its list of the 60 "greatest game shows ever".
You can validate your puzzle solution with certitude.