>>111862442Same thing happened in one of Byrne's first Superman issues.
A Lexcorp scientist feeds a bunch of data into a computer, and it spits out "Superman is Clark Kent." Luthor laughs, calls the scientist a retard, and fires her for making such a foolish computer.
She reappears years later, is convinced that Kent is Superman, gets a private investigator killed by accident, steals Luthor's Kryptonite ring (which gave him cancer), then dies to a mugger in Gotham city