I have told each of them this: "I do not want you to think what I think. I want you to decide for yourself what's right and wrong."
So far, they have done exactly that, and they have resisted the indoctrination.
Perhaps in this is the answer to my question (vide supra).
Perhaps in the exhortation to seek TRUTH--TRUTH for its own sake--wherever it should present itself--lay the admonition to resist un-TRUTH which includes indoctrination.
If so, the real challenge is instill the demand for TRUTH in the population.
That will threaten long cherished delusions.
People hate relinquishing their delusions.