For generations, engineers have waged quiet war against electrical noise, treating randomness as the adversary of precision. Researchers at KAIST have turned that assumption inside out, discovering that the same probabilistic fluctuations the human brain relies upon for flexible thinking can be deliberately tuned within a memristor-based artificial neuron. By adjusting a single component's resistance state, the same circuit can shift its attention from the slow rhythms of human movement to the rapid cadences of speech — a single piece of hardware learning, in its way, to listen differently. In