And perhaps that explained why, even in an age of AI-managed kitchens and globally synchronized supply chains, people continued to swear that one familiar restaurant made the world’s best burger—while another, following the very same manual, somehow When Aya joined the sensory science division of a global fast-food company in 2026, she expected to spend her days measuring salt, sugar, fat, and texture. Instead, she found herself investigating rumors. One city insisted that the burger from its airport branch was the best in the country. Another claimed that a suburban outlet had “lost the recipe.” Social media was full of videos comparing identical menu items purchased only a few kilometers apart. Thousands of comments confidently declared that one restaurant was objectively better than another. The problem was awkward. Every beef patty came from approved suppliers whose production lots were statistically monitored. Bun moistu...