Diverging Agreement

Imagine there's a wall. Two people are staring at it. One person says, "I think the wall should be red." The other says, "I think it should be blue."

One person runs to the wall and paints it red. The other runs to it and paints it blue. One person then paints it over with red. The other then paints it over with blue.

As they continue, the colors become less like themselves and more like each other. Eventually, the wall becomes purple. Both people stop painting, look at each other, and say, "Perfect."