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The problems are societal in nature. I don't beleive either the parent commentor or original author fully appreciate this.

Adversarial teaching environments are a symptom, not the problem. And the fundamental issues don't have a clear solution, though it is clear that the situation is far from optimal.

They could have set work that is difficult to lift word for word, or examine in any number of ways that do not allow googling

In principle, you remove the incentive for plagiarism by making the students' reward for their work be what they learn as a result, rather than some kind of certificate.

Oh cool, so we just need to fix a massive social problem that's generated by long-running structural trends within our society and economy. Then we can stop using plagiarism detection software.

... So we shouldn't try to fix the problem?

Of course we should, but we shouldn't be naive about the challenge doing so represents.