Evaluative metering is correct most of the time. It analyzes the scene, weights the meter reading toward the focus point, and produces an exposure that protects the most information across the widest area of the frame. In scenes with even illumination and a subject that occupies a significant portion of the frame, it works without adjustment. In scenes where the subject is lit differently from the background — a face in open shade against a bright street, a person near a window with an unlit room behind them — evaluative metering averages toward a wrong answer.