Yeah, what AlexK said, OF COURSE you can! I do!
On another note, though, there is really no such thing as "forgetting," sure, maybe you can't consciously remember where your keys are, but unconsciously you know exactly where they are.
It is much the same for PR'ing. We flip through the WHOLE book, and we cannot consciously "remember" it, but it's all there, unconscious, waiting to get out.
