1. Russell SJ, Norvig P (2016) Artificial intelligence a modern approach, 3rd edn. Pearson Education, London
2. Legg S, Hutter M (2007) A collection of definitions of intelligence. Front Artif Intell Appl 157:17
3. Legg S, Hutter M (2007) Universal intelligence: a definition of machine intelligence. Mind Mach 17(4):391–444
4. Russell SJ (2019) Human compatible AI and the problem of control. Allen Lane, London
5. Plato (1888) The republic of Plato (trans: Jowett B, ed). Clarendon Press, Oxford