Somewhat OT: this is not really Rumsfeld’s taxonomy. My first knowledge of it is probably from the 1997 book, “To Do, Doing, Done”—which in turn cited the space program as the origin of the taxonomy, and also of a phrase, “deadly unk-unks” used to describe the unknown unknowns.
Somewhat OT: this is not really Rumsfeld’s taxonomy. My first knowledge of it is probably from the 1997 book, “To Do, Doing, Done”—which in turn cited the space program as the origin of the taxonomy, and also of a phrase, “deadly unk-unks” used to describe the unknown unknowns.
“Deadly unk-unks” is much funnier than “unknown unknowns”.
Ah, thanks for the cite. And “deadly unk-unks” is the best phrase I’ve encountered this week, so thanks for that too.