 There are radically different views about the measurement of intelligence that have not been canvassed in this article. Our concern has been to discuss Turing (1950) and its legacy. But, of course, a more wide-ranging discussion would also consider, for example, research on the measurement of intelligence using the mathematical and computational resources of Algorithmic Information Theory, Kolmogorov Complexity Theory, Minimum Message Length (MML) Theory, and so forth. (For an introduction to this literature, see Hernandez-Orallo and Dowe (2010), and the list of references contained therein. For a more general introduction to research into AI, see Marquis et al. (2020).)