🚨 NEW STUDY: Microsoft Research and Carnegie Mellon just surveyed 319 knowledge workers across 936 real AI use cases. The finding they buried in the data is the most important thing written about AI and the workplace this year. The more you trust AI, the less your brain actually engages. Not a theory. A measured inverse correlation across hundreds of real professional tasks. Here is how the study worked. 319 knowledge workers documented 936 actual instances of using generative AI in their real jobs. Not lab tasks. Not hypothetical scenarios. Real work they did that week. For each use case they reported the task type, the stakes involved, how much they trusted the AI output, how much critical thinking they applied, and how much cognitive effort they felt the task required. Three findings came back that nobody in the productivity space wants to talk about. Finding one: trust in AI directly predicted less critical thinking. The workers who expressed high confidence in AI outputs applied significantly less scrutiny to those outputs. They accepted more. They questioned less. They moved on faster. The correlation held across task types, industries, and experience levels. The inverse was also true. Workers with higher confidence in their own abilities thought more critically when AI was involved, not less. They used AI as a starting point and interrogated it. The people most likely to use AI well were the people who trusted themselves more than the tool. Finding two: the danger zone is routine tasks, not high-stakes ones. For high-stakes decisions, workers actually reported more cognitive effort when using AI than without it. Verification anxiety kicked in. They checked the output. They second-guessed. They cross-referenced. For routine, everyday tasks, effort collapsed. Workers reported significantly less cognitive engagement for the ordinary work that makes up the majority of most people's days. Summarising. Drafting. Responding. Reviewing. The tasks people do dozens of times a week. They were on autopilot. ...