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What you are describing here, with the idea of equating schooling instruction with standardised test results, is an example of Goodhart's Law. This is a phenomenon I have been very interested in lately and I have touched on previously in: https://samuelkammin.substack.com/p/school-uniform-and-the-performance, although not as thoroughly as you have here. It also resonates nicely with your reference to Donald Campbell, someone I am less familiar with. Thank you for recommending this piece Chris, and I look forward to reading more from you

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