The question that breaks every AI demo

Picture the scene. You've just founded a travel-planning startup - let's call it WanderAI. The pitch is simple and gorgeous: a customer types "ten days in Japan, mid-budget, foodie, hates crowds," and an AI agent crafts a perfect itinerary in seconds. The demo dazzles. Investors lean in. Your co-founder is already drafting the launch tweet.

Then someone in the back of the room - operations, maybe, or your cautious head of platform - asks the question that breaks every AI demo:

"How do you know it's actually working?"

Not "is the server up." Not "is the model responding." But the four uncomfortable questions hiding underneath: