Both Uses of

inseparable
in
A Prayer for Owen Meany

I doubt that Owen ever would have become "sophisticated" enough to make that separation—not even today, when it seems that the only people who are adamant in their claim that public and private morality are inseparable are those creep-evangelists who profess to "know" that God prefers capitalists to communists, and nuclear power to long hair.†
p. 375.8 *

If, at Gravesend Academy, The Voice had persuaded the majority of the faculty that his eccentricities and peculiarities were not only his individual rights but were inseparable from his generally acknowledged brilliance, the more diverse but also more specialized faculty at the University of New Hampshire were not interested in "the whole boy," not at all; they were not even a community, the university faculty, and they shared no general opinion that Owen Meany was brilliant, they expressed no general concern that his individual rights needed protection, and they had no tolerance for eccentricities and peculiarities.†
p. 439.8

Definition:

not capable of being separated

or: people who and are almost always seen together -- usually close friends who like each other's company