@article{jbp:/content/journals/10.1075/is.6.1.08hil, author = "Hilton, Denis and Villejoubert, Gaëlle and Bonnefon, Jean-François", title = "How to do things with logical expressions: Creating collective value through co-ordinated reasoning", journal= "Interaction Studies", year = "2005", volume = "6", number = "1", pages = "103-117", doi = "https://doi.org/10.1075/is.6.1.08hil", url = "https://www.jbe-platform.com/content/journals/10.1075/is.6.1.08hil", publisher = "John Benjamins", issn = "1572-0373", type = "Journal Article", keywords = "conditionals", keywords = "quantifiers", keywords = "conversation", keywords = "probability", keywords = "logic", abstract = "We argue that logical expressions in human language enable speakers to perform particular acts as well as stating propositions which may be true or false. We present a conversational action planning model of co-ordinated reasoning, which we use to predict choice of logical expressions in situations in which two people co-operate in the face of risk and uncertainty. We first show how this model predicts preferences for formulations of conditional directives where a principal instructs an agent on how to behave in a hypothetical situation. Second, we show how this model accounts for choices of quantity and probability expressions that express risk, in situations where a professional advises a client on her options. We conclude that the pragmatic signals encoded in human logical vocabulary can facilitate the co-ordination of social interaction through aiding mutual recognition of intentions on joint projects where collaboration is likely to create value.", }