Oh, don't you know that family affection's the dumbest thing on earth?
"The Woman With The Fan"
Robert Hichens
Wellington, when in action, was the dumbest of dumb things, and it would have required a moral earthquake to get more than some curt order out of him.
"The Adventure of Living"
John St. Loe Strachey
"The dumbest, woodenest, most conscientious young female person it has ever been my lot to meet," goes on Mr. Mills.
"Torchy, Private Sec."
Sewell Ford