Many technique ideas based on certain themes are out of line with the level of the attack. To poke a man in the eyes for a shoulder grab is only one idea on a theme. You learn to talk, then you learn your ABCs, then you learn to write. Phonetics, alphabet, print, write, shorthand. But let's not forget, just because you can say the word, doesn't mean you can spell it, or know its true meaning.
Every phase builds upon the previous skills and knowledge acquired.
However, each level if learned in proper sequence is capable of standing alone as a workable segment of the whole. When you learn your ABC's and spell the word, there is one way. Each level of American Kenpo has its own ranks and certifications. It is important to understand you do not loose any ranks achieved on previous levels. But, like a Ph.D. who decides to move to a another level and become a surgeon, you must learn the basics and fundamentals associated with the new level of skills you wish to obtain.