Maybe not unlearning so much as learning that alternatives exist. Like Tequila implied, there are a lot of things you 'learn' that go deeper than simple knowledge and extend to identity, culture, behavior, etc - A lot of which cannot be realistically undone. I think that really the 'unlearning' process is discovering that an alternative even exists, and then slowly, one thing at a time, reconciling what you already believe or understand about the world with that new knowledge. Basically, adapting to anarchism is the same learning process involved in internalizing any new knowledge... Just far more profound and far-reaching in it's implications than most discoveries.