[Alawiggle]

I recently purchased a book called "Play Classical Guitar" by David Braid. I saw a lot of good reviews for it, so I'd figure I'd get it to really get me into the type of guitar I like...acoustic, classical, fingerpicking, etc. Anyway, no tab so you have to "read" the notation. My question is, how do you know when you're reading music and not just memorizing?

I tend to think I am reading it since if I take away the sheet music as a guide, then I don't know what I'm playing or what note comes next, but at the same time I still get a feeling the notation is just kick starting my memory. Any ideas?