Memory Supercharger helps in learning the system, but it's not a nessesity for learning individual books.
Memory Supercharger is a good aid for dreams, if one applies it to that purpose (e.i. to remember when one is dreaming). I've also found that the statement, "your memory bank is just like any other bank," allowed me the framework nessesary to take out loans from my memory bank. In truth, precognition isn't that great. Usually, it manifests in the most banal of things.
