Dan Sperber/Deirdre Wilson, Relevance: Communication and Cognition, Cambridge Mass: Harvard University Press 1986, 254 pp.1 Alan C. Purves, ed. Writing Across Languages and Cultures: Issues in Contrastive Rhetoric, Written Communication Annual: An International Survey of Research and Theory, vol. 2. Newbury Park, CA: Sage, 1988. Brian Vickers, In Defence of Rhetoric. Oxford: Clarendon Press, 1988. Pp. xvii + 508.