 Normativity half-solves the many-disposition problem. Some ways of imparting energy to an object are more telling than others. By contrast, light is the sole “thwacker” for colors (modulo differences in intensity and light spectrum), but there are many twhackers for eliciting the sonority of an object. The dispositional theory of colors suffers from some variant of the many-disposition problem. The color of many objects and stuff depends on their temperature. At 1000 °C, iron glows. At −20 °C, water is white.