[citation needed]

Easily locatable under that name. The Daugherty is the late Richard D. Daugherty, who was Professor of Anthropology at Washington State University.

Googling for "Daugherty's Law" only returns law firms, and a cursory reading up on Richard Daugherty doesn't seem to indicate anything of the aforementioned.

So, yes, would appreciate a citation so we can all learn a new trivia of the day.

Yeah, seems like something a professor said one day in class but never published.