https://mnstry.org/topics/instruments-of-care/ Care is easy to declare and hard to instrument. These articles walk what happens when a product that means well hands the question of whether it is working to a number, and the number turns out to have been chosen, shaped, or pointed in a direction nobody examined. The order runs from the sign of a metric to the independence of a measure to the accuracy that flatters a system while describing a smaller life, then down to the parameter underneath and out to the person the whole apparatus was built to help. https://mnstry.org/writing/success-looks-like-disuse/ https://mnstry.org/writing/success-looks-like-disuse/ Why graduation is the positive outcome for any tool whose job is building capacity, and what a metric set needs before it can record the best thing the product ever does. The canonical treatment of the graduation metric. Mon, 03 Aug 2026 00:00:00 GMT https://mnstry.org/writing/the-tautology-trap/ https://mnstry.org/writing/the-tautology-trap/ Why an instrument validated against a paraphrase of itself proves nothing, from a 1950 taxonomy of criterion bias to the evaluation that asks a rater whether an answer was helpful. The canonical treatment of the tautology trap. Mon, 03 Aug 2026 00:00:00 GMT https://mnstry.org/writing/what-accuracy-measures/ https://mnstry.org/writing/what-accuracy-measures/ Why a rising accuracy number is ambiguous between a better model and a narrower life, and what keeping prediction apart from steering protects. The canonical treatment of the accuracy and freedom inversion. Mon, 03 Aug 2026 00:00:00 GMT https://mnstry.org/writing/the-parameter-is-a-policy/ https://mnstry.org/writing/the-parameter-is-a-policy/ How a privacy budget, a classification threshold, or a decay constant becomes an unreviewed ruling about people, and the disclosure that converts it back into a decision someone can be held to. The canonical treatment of a parameter as policy. Mon, 03 Aug 2026 00:00:00 GMT https://mnstry.org/writing/the-expertise-reversal/ https://mnstry.org/writing/the-expertise-reversal/ The measured case that identical guidance crosses from support to interference, from electrical trainees whose results flipped once they trained. The canonical treatment of the expertise reversal effect. Mon, 03 Aug 2026 00:00:00 GMT