She picked up a carrot and snapped it in half with ease. “The carrot was strong when it went into the boiling water,” she explained. “Firm. Unyielding. But after the heat, it softened. Lost its strength.”

Then she peeled the egg and sliced it open. “The egg was fragile on the outside,” she continued. “But inside, it was liquid. After boiling, the shell looks the same—but the inside has hardened.”