According to @godofprompt citing @rryssf_, MIT researchers ran a four-month EEG study titled “Your Brain on ChatGPT” with 54 participants across three conditions (ChatGPT-assisted writing, search engines, and unaided writing), reporting a 47% decline in functional connectivity during tasks for the ChatGPT group (from 79 to 42 active connections), with suppressed activity in creative, executive control, and self-monitoring regions. As reported by the same thread, 83.3% of ChatGPT users could not recall a single full sentence from essays they had just produced, unlike the search and brain-only groups, indicating reduced memory encoding and task ownership. According to the thread summary, in a subsequent session without assistance, alpha and beta connectivity in the prior ChatGPT group remained suppressed, suggesting persistent “cognitive debt.” For AI industry strategy, this implies: enterprises should define policy for generative co-writing versus solo creation; edtech and L&D vendors can build “active recall” and spaced retrieval modules around LLM workflows; productivity software should add cognitive load-balancing features (e.g., effort meters, recall checks); compliance teams should track authorship and oversight risk when model output reduces user monitoring; and AI product managers can prioritize mixed-initiative designs that require user-generated scaffolds to preserve engagement. Note: These findings are reported via a Twitter/X thread; readers should consult the original MIT paper for methodological verification and effect sizes.