Kearney, Richard. The Wake of Imagination: Ideas of Creativity in Western Culture. London: Hutchinson, 1988. p. 169.
McGinn, Collin. Mindsight.: Image, Dream, Meaning. Cambridge, Mass. Harvard University Press, 2004. p. 170.
For the logical positivists, there were only two basic kinds of meaningful statement: logical propositions and reports of simple sense data; see: Geoffrey Sampson, Schools of linguistics, Stanford University Press, 1980, p. 63.
