There's another way to phrase that and that is that the absence of evidence is not the evidence of absence. It is basically saying the same thing in a different way. Simply because you do not have evidence that something does exist does not mean that you have evidence that it doesn't exist.
Donald RumsfeldThere are things that we know, and there are things that we don't know. Then there are the things that we don't even know that we don't know. Those are the things that are the hardest.
Donald RumsfeldInspectors do not have the duty or the ability to uncover terrible weapons hidden in a vast country. The responsibility of inspectors is simply to confirm evidence of voluntary and total disarmament. Saddam Hussein has the responsibility to provide that evidence, as directed, and in full
Donald RumsfeldReduce the number of lawyers. They are like beavers - they get in the middle of the stream and dam it up.
Donald Rumsfeld