Shin, there are many theories as to how memory works. Please, try it and post your results. I always assumed that a PhotoRead book would stay in the preconscious indefinately. (After all, books aren't really "activated" in Direct Learning).
One thing I have noticed with activation is the more I've photoread a book, the faster it goes. One book I PhotoRead about 6 times before activating, and I blasted through it in two hours of activation. One book I only PhotoRead twice, and I'm still activating it.
Because preconscious memory is rather difficult to access, (i.e. there is less "re" in the whole "remember") it's hard to say is there is such a thing as "long-term preconscious memory). I think we should rule it in until we disprove it, simply because the belief it exists it more empowering than a belief that it does not.
