We need contrast to see anything. Without light and shadow all would be pitch dark or bright white fog. Beginning drawing and painting lessons teach how to see and reproduce light and shadow in order to create the illusion of three dimensions and distinguish between objects. Newborns are fascinated by contrasting patterns. Sentient beings survive by distinguishing between safe and not safe, food and not food, suitable mate and not suitable mate. This pattern-seeking ability to make distinctions is also essential to our ability to learn and create. Human and artificial intelligence is based on minute decisions of this or that and 0 or 1.