Each day, SumRunner presents five top stories about the state of artificial intelligence. Four are real, human-curated summaries of important developments. One is a complete fabrication—a hallucination designed to sound plausible.

Your challenge is to spot the fake. The goal isn't just to trick you, but to serve as a daily exercise in skepticism. In an age of automated content, questioning sources is a critical skill. SumRunner is a briefing, a game, and a training ground.

Stay informed. Stay skeptical.