The “Quantum Zeno effect” or “Turing Paradox” is the idea that if you measure a quantum system repeatedly and rapidly you can prevent it from changing. As always, the easiest thing to consider is light, which wears its quantum mechanical properties like they’re going out of fashion. There are a lot of things that cause the polarization of light to rotate, like passing it through sugar water. But if you shoot it at a diagonal polarizer first, half will get through the diagonal polarizer ( is half and half ), and then half of that will get through the horizontal polarizer ( is half and half ). It goes from acting like a series of vertical polarizers, to acting like a fan that can rotate light.