in the brief news on a tv station over viewing PR here , the guy who was guided by Paul Scheele said "he couldn't actually come out with a clear purpose" when he randomly choose to pr the book "accelerated learning".

Din that pr require an effective purpose to get effective result? WHy he can claim that he is successful in PR at the end of the clip?

The purpose thing is bothering me throughout PR. I cannot PR b'cos i hardly come out with any purpose when reading the textbook. My purpose is merely "to pass the test with ease". Is that considered an effective purpose? If we require a purpose only we can start reading, we will not read most of the books!