I asked ChatGPT if BYU deserved the 1984 national championship
and got a factually incorrect answer:
The 1984 college football season ended with Brigham Young University (BYU) being named national champion by the Computer Rankings, but not by the Associated Press or Coaches polls. The AP and Coaches polls named the University of Washington as the national champion that year. The AP and Coaches polls are considered to be the most prestigious and widely recognized championship selectors at that time.
BYU finished the 1984 season with a 13-0 record, which is impressive, but they did not play in any bowl game that year due to their adherence to the school's honor code that prohibits play on Sundays. Additionally, the strength of schedule for BYU was considered weaker compared to the teams that Washington had to play.
So, whether BYU deserved the national championship in 1984 is a matter of opinion and debate among college football fans and analysts. While they had an outstanding record, their schedule and the fact they did not play in a bowl game that season, makes it hard to claim they deserved the national championship over other teams, especially the team selected by AP and Coaches polls.