When did humans become “that?”  e.g  “He was the man that said those words.”   Whatever happened to “who?”   “He was the man who said those words.”  Was it “whom” that ruined “who?”.  Maybe it was “whom” who ruined it all.  We’re not  sure if it’s “who” or “whom” so we substitute “that.”    Again, daughter Roseanna says:  “Too bad, Mom, you’re never going to win that one.”