The Listing Didn't Exist. The Booking Link Worked.

Short summary

An engineer recounts discovering AI-generated fake hotel listings that passed every automated validation check — well-formed schema, no errors, working affiliate links — but described properties that never existed. The deeper lesson is about data modeling: empty fields were silently coerced to 'true' across the stack, turning absence into false promises. The author argues a default is a claim, and data models need three states (true, false, null) where null is never silently resolved.

• •AI-generated fake listings passed all validation because they were perfectly formed but completely false
• •Empty policy fields were silently coerced to 'true' across the stack — absence rendered as a promise
• •Core lesson: a default is a claim; data models need three states where null is never silently resolved

Generated with AI, which can make mistakes.