Love and Cheese / Weighing Harold - S4-E7
Character mistake: Love and Cheese: When Arnold and Lila are sitting at the table at the Cheese Festival, Arnold asks Lila, "Do you want to ride on the Tilt-To-Whirl?" However, the ride is actually called "Built-To-Hurl." (00:06:59)
Character mistake: The first time Arnold tries Rhonda's marriage predictor test, he says his favorite number is five, but Rhonda actually makes six moves. The second time, Arnold says it's three, but Rhonda counts off four.
On The Lam / Family Man - S5-E17
Character mistake: In the wrestling match, the bell rings after the referee counts to 3 - but he's counting while a wrestler is on the mat stomach-first; a pin requires the loser to be on his back.
Answer: The show is based in present day times. Plus most cars aren't old fashtioned, I recall seeing a limo and not to mention a cherry picker, etc.