Orr found that humans generally thought in terms of simplistic binaries. (AUDIO: Orr)
When the Fourteenth Doctor described the Toymaker to those at UNIT as being an elemental force beyond the rules of the universe, Shirley Bingham asked what this was supposed to mean. He replied that those and the others there thought life to be a balance between order and chaos, but that the universe was not binary, that there was order and chaos and play.(TV: The Giggle [+]Error: Code 2 - no data stored in variables, cache or SMW.)