I used to know that

Clouds & Calvin's Dad

Just for the record: Light in its natural state is white light, i.e., it comprises the seven wavelengths of the visible spectrum as it moves from infrared to ultraviolet (such wavelengths correspond to colors red, orange, yellow, green, blue, indigo, and violet.) The sky and the clouds act as filters for white light. Regarding the clouds, its water droplets or ice crystals scatter the light uniformly, meaning that light is not separated, remaining white. I used to know that. By the way, a qualifying exam to be a dad would likely amount to human extinction.