Briefle words · Prompt craft
Negative constraints
Explicit instructions about what the AI must not do or include.
Say it to an AI
Plan 3 days in Lisbon in May for me and my mum. Constraints: €500 total for both of us excluding flights and hotel, no car, and no steep walking (she can't manage hills), so use trams, trains and taxis. Show a cost estimate per day.
How an expert would ask for the stronger version of “City break itinerary”.
See it
Try it as a puzzle →Someone asks an AI assistant to plan a short trip to Lisbon with their mum.
Why: A's 'No car' rules out exactly what B's reply suggests on Day 2: 'rent a car and drive to Sintra'.
Related words
Room 1 · Essentials
Learn “Negative constraints” in a five-minute lesson