"The book plus the lectures equals total conceptual understanding."
On the release of the Basics at the Maiden Voyage Anniversary Event, June, 2007; repeated in virtually every promo piece ever since.
At the same event, COB told us, "You don't even need a dictionary."
As covered by LRH, full conceptual understanding is achieved through the application of standard study tech, especially word-clearing.
COB's formula for full conceptual understanding was made up.