Home > Topic > unknown unknowns- things
1 " And for once, Donald Rumsfeld, in the news at the time over the Iraq war made sense to me: " As we know," he said, famously, " there are known knowns-things we know we know. We also know there are known unknowns-things we know we don't know. But there are also unknown unknowns- things we don't know we don't know. "
