There was one study back in the 1940s(?) that justified it. The researchers who did the study intended it to include water that was in the food a person consum

There was one study back in the 1940s(?) that justified it. The researchers who did the study intended it to include water that was in the food a person consumed but the person doing the press conference didn't know that and so responded incorrectly when some reporters asked him about that issue.