In certain situations speakers are known to prefer indirect responses to Yes/No questions over direct ones. According to Relevance Theory, which is the predominant framework for pragmatics in recent linguistics, this kind of psychological bias is explained solely in terms of added conversational implications as conveyed by the indirect replies. Thus, gShe doesnft drink whiskyh is effectively used in response to a question like gDoes Susan drink whisky?h with extra implications that cannot be derived from the direct answer gNo, she doesnft.h The implications will include, for example, gShe doesnft drink beer,h gShe may prefer soft drinks,h gShe probably disapproves of getting drunk,h etc.
In this paper, we challenge this thesis and propose instead that a completely different type of pragmatic force is in fact involved in the speakerfs choice of expressions at large. It is claimed that the force operates on the basis of implicature-generating scales, whose implementation depends on such interpersonal factors as are embodied by politeness considerations, on the one hand, and by sarcastic intentions, on the other. The scales are also shown to be widely pervasive in the choice of expressions from among synonymous alternatives.
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