

No, the AI was most certainly trained on the same stack overflow posts as humans would manually search out in the past.
Thus the effective difference is precisely that between an active attempt to understand and blindly copying since the AI is specifically there to introduce a stochastic opaqueness between truth (i.e. sufficiently curated training data) and interpretation of truth.
There is a context to stackoverflow posts and comments that can be analyzed from many different perspectives by the human brain (who posted the question with what tone, do the answers/comments tend to agree, how long ago was it posted etc…), by definition the way LLMs work they destroy that in favor of a hallucinating-yet-authoritative disembodied voice.
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Very cool!