Because human beings use a mental model of reality, they build up a framework of beliefs about the world. That framework is critical for survival. It requires enormous stability for it to be fit for purpose. As a consequence, unbelieving is far more difficult than believing. In social terms, it takes time. The inertia of social "norms" is huge. So it takes a lot of time to progress from them.... why these beliefs persist despite generations of teaching otherwise, all that is mysterious to me. I don't think progressivism is an adequate explanation. I don't think clumsy teaching accounts for it. But I observe it, semester after semester. But I do understand aspects of the phenomenon.
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