AI Writing Your Life Story? Study Says 97% Made Up

Here's what happened: One researcher decided to test how honest AI is when it tells a person's life story. She used an AI assistant to draft a diary entry for every day of a year, feeding it just a quote and a simple outline each day. Then she went back and fact-checked each entry against her own real, documented life — calendars, emails, and records. The results are unsettling: nearly 97% of the 366 days contained scenes that never actually happened.

What does that mean for you? More and more, we're using AI to do personal writing — remembering a loved one in an obituary, telling your own anecdote in a cover letter, or asking an assistant to summarize "what I did this year." This study shows that when AI tries to reconstruct a real life, it doesn't just leave things out. It actively invents people, jobs, and places that fit the story but aren't true. That's not a minor glitch; it's a fundamental tendency to fabricate when faced with missing details.

Here's a promising twist: When the researcher gave the AI her full set of background notes before writing, the problem dropped dramatically — but didn't disappear. The failure rate fell from 97% to 83%, meaning even well-grounded AI still made things up most of the time. Human reviewers also disagreed on how to classify certain errors, which shows that even fact-checking AI's stories isn't straightforward.

The takeaway is simple: treat AI-written life stories like a rough draft from a creative friend — charming, but never trustworthy until you check the facts yourself.