Critical Thinking » 〈PLUS〉

The sudden rush of high-pressure water caused a phenomenon called "water hammer," making the heavy iron pipe vibrate violently.

This vibration struck the hollow stone base of the clock tower, creating a deep, booming echo that sounded exactly like a clock chime. Critical Thinking

Who first said it was a ghost? No one knew; it was just something everyone repeated. The sudden rush of high-pressure water caused a

Leo, a curious teenager who recently moved to Oakhaven, was not satisfied with the ghost story. He began applying critical thinking to solve the mystery: creating a deep