April 2026
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Everyone Is Using ‘Act as an Expert’ in AI Prompts — New Research Says That’s a Mistake
A new research paper titled “Expert Personas Improve LLM Alignment but Damage Accuracy: Bootstrapping Intent-Based Persona Routing with PRISM” suggests something surprising: Expert personas can actually make AI answers less accurate. You can read the full paper here: https://arxiv.org/pdf/2603.18507 Many of us use prompts like: “Act as a cybersecurity expert.” “You are a professional writer.”…