1. John R. Searle ,Speech Acts: An Essay in the Philosophy of Language( Cambridge : Cambridge University Press , 1978 ), p. 14 , emphasis in the original .
2. Percy Cradock ,Know Your Enemy: How the Joint Intelligence Committee Saw the World( London : John Murray , 2002 ), pp. 165 – 166 .
3. Lord Butler of Brockwell ,Review of Intelligence on Weapons of Mass Destruction( London : TSO , 2004 ), p. 13 .
4. See, for example, Michael Herman ,Intelligence Power in Peace and War( Cambridge : Cambridge University Press , 1996 ), pp. 261 – 265 .