Other AI hallucinates. Why would vi be different?

Because vi does not write freely but works from your documents. For every deadline, defect and price, vi shows which document and which passage the statement comes from. If something is not in your documents, vi says so instead of guessing.

No software is error-free. That is why you can check every statement against its source with one click, and nothing goes out in your name before you have approved it.