He mean that rather than directly interacting with concept, you can indirectly affect the concept by affect what the concept tied to, since Type 2 mean the concept itself is dependent on something, if you affect said thing, it will create a chain reaction that alter the concept
However in this case, CM1 guy try to affect the NEP guy that lack concept type 2, so it is pointless since there is no concept to interact with, and the concept is absence, it can't be tied to anything for CM1 guy to indirectly affect the concept via affect what the concept tied to.