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Your prompt A/B test is lying to you (if you keep checking it)

You rewrote the support prompt. Two days later the dashboard says the new version resolves four points more tickets, and the 95% interval doesn't touch zero. You ship it. A month later the resolution rate is exactly where it was. The arithmetic was fine. What went wrong was when it was read. This i…

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  1. 2026-11-11 12:26 · DEV Community — AI
    Your prompt A/B test is lying to you (if you keep checking it)

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