†  IPCC. Climate Change 2001: The Scientific Basis. Cambridge, UK: Cambridge University Press, 2001, p. 774: “In climate research and modelling [sic], we should recognize that we are dealing with a coupled nonlinear chaotic system, and therefore that the long-term prediction of future climate states is not possible.” See also: IPCC. Climate Change 1995: The Science of Climate Change, p. 330. “Natural climate variability on long time-scales will continue to be problematic for CO2 climate change analysis and detection.”