Quick! Put the lid on before they get out! (the worms) I think i know what he's talking about. He's working on the premise that it is easier to relate to the 8 notes in the major scale by number position, rather than their tonal value, so you can easily know where you're at on the fretboard. He also wants you to use the major scale formula (R2212221)and work it in your head. Really, if you know the formula, and of course the strings on the guitar, you can know what the tonal value is, without memorizing it.It still takes me a delayed reaction to figure it in my head---"2 frets from a G is A"....Just remember where there aren't sharps and flats, and you're home!