“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.”
“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”
“Something unknown is doing we don't know what.”
“We're guys. Half the time, we don't know who we are. It helps things become a lot easier if we know who you are.”
“We can only speak the truth that we know at the time it is known.”
“It ain't so much the things we don't know that get us in trouble. It's the things we know that ain't so.”