A central conclusion of this chapter is that ​

A) if there is knowledge, it must be empirical.
B) knowledge is innate.
C) knowledge is subjective.
D) knowledge requires a working out and systematic understanding of our claims.

The chapter emphasizes the importance of developing a systematic approach to understanding our claims, which suggests that knowledge requires a certain level of working out and organization, rather than simply relying on subjective or innate understanding. The chapter does not argue that all knowledge must be empirical, as there may be other means of acquiring knowledge beyond sensory experience.