This paper deals with two distinct topics; unwarranted questions and admittures. The traditional speech act analysis of questions needs revision, since among the felicity conditions of asking a question is believing that the question is warranted. Some questions are unwarranted according to my analysis. A question is unwarranted if the questioner is not standing in the right relation to the addressee, such that he can demand or expect a sincere answer. I use the idea of unwarranted questions to show how (...) conversational admittures can be generated. A conversational admitture is a non-intended admittance by the speaker of some state of affairs being believed by the speaker to be true. Under the assumption that the speaker is rational, the non-intended admittance is something that it is reasonable to credit the speaker with believing as an explanation of the speaker's unwillingness to be cooperative in a given conversation. In the last section I introduce what I call the Principle of Privacy, which tells us that we have a prima facie right to guard some of our thoughts, feelings, personal history, etc. I argue that the Principle of Privacy together with the ideas that there are unwarranted questions and conversational admittures, and the way unwarranted questions can be exploited to generate the latter, endows us with the right to lie in certain contexts. ; ; . (shrink)

Scalar implicatures depend on alternatives in order to avoid the symmetry problem. I argue for a structure-sensitive characterization of these alternatives: the alternatives for a structure are all those structures that are at most as complex as the original one. There have been claims in the literature that complexity is irrelevant for implicatures and that the relevant condition is the semantic notion of monotonicity. I provide new data that pose a challenge to the use of monotonicity and that support the (...) structure-sensitive definition. I show that what appeared to be a problem for the complexity approach is overcome once an appropriate notion of complexity is adopted, and that upon closer inspection, the argument in favor of monotonicity turns out to be an argument against it and in favor of the complexity approach. (shrink)

The cognitive function of mental images with respect to the referential aspect of language is examined and used in the listener model ANTLIMA of the natural language system SOCCER. An operational realization of the reference relation used to recognize instances of spatial concepts in the results of a vision system and also to visualize locative expressions is presented and compared to A. Herskovits' analysis of the semantics of spatial prepositions.