"The capacity to think about our own thinking may lie at the heart of what it means to be both human and intelligent. Philosophers and cognitive scientists have investigated these matters for many years. Researchers in artificial intelligence have gone further, attempting to implement actual machines that mimic, simulate, and perhaps even replicate this capacity, called metareasoning."
- from Metareasoning: Thinking about Thinking. Edited by Michael T. Cox and Anita Raja. MIT Press, 2011. Image from the same source.