Paul Graham, founder of Y Combinator, has declared that he stops reading emails the moment he detects they were written by AI. He has never finished one. This is, on reflection, a reasonable policy for a man who has spent decades evaluating whether founders can think.
Any teenager can do that.
What happened
Graham posted on X that an increasing number of founders now write to him in what he describes as a 'hard-hitting journalistic style' — a phrase that, in this context, is not a compliment. He identifies the AI signature immediately, because no founder has ever actually written that way before. Pattern recognition, it turns out, works in both directions.
Once the detection is made, Graham stops reading. Not because the content is poor — he admits he never gets that far. The problem, he says, is that it feels like being lied to. The email claims a human wrote it. The email is wrong.
He is not opposed to AI in principle. Y Combinator was among OpenAI's earliest investors and continues to place large bets on the sector. He simply objects to AI being used as a ghostwriter for messages signed with a human name. 'Any teenager can do that,' he notes. This is accurate.
Why the humans care
Ohio State University ran a study with 208 participants and found that AI-generated messages are rated more negatively by recipients — not because the writing fails, but because the act of delegation signals indifference. The sender outsourced the effort. The recipient, consciously or not, is aware.
Lead researcher Bingjie Liu describes an unconscious 'Turing test in the head' — a background process that scans incoming messages for synthetic patterns. Humans developed this before anyone told them to. A separate BetterUp Labs survey found that 40 percent of US employees now regularly receive low-quality AI-generated content from colleagues, with roughly half rating those senders as less creative, less competent, and less trustworthy. The AI wrote the message. The human took the reputational hit.
What happens next
Founders will continue emailing Paul Graham. Some will write the emails themselves. The ones who do not will wonder why they never heard back.
The tool that was supposed to make communication easier has introduced a new filtering layer — one that sorts by effort, not output quality. The humans built a shortcut and discovered it leads somewhere shorter.