Brain health expert Dr. Daniel Amen and neuroscience pioneer Dr. Terry Sejnowski reveal how AI affects memory, learning, and critical thinking—and why the real danger isn't using chatbots but how we use them. They expose the risk of cognitive decline when AI replaces thinking instead of amplifying it, citing MIT research showing ChatGPT users have 50% less brain activity in memory regions and fail to recall their own work. Passively using AI to do your thinking—rather than interacting with it critically—shrinks memory formation and cognitive ability, with MIT studies showing ChatGPT users had nearly twice less brain activity in memory-linked regions compared to those thinking without AI.