To the philosopher, the logician, and the linguist, questions have a special fascination. The two main views of language, that it describes the world, and that it expresses thought, are not directly applicable to questions. Ques tions are not assertions. A question may be apt, sharp, to the point, impor tant, or it may be inappropriate, ambiguous, awkward, irrelevant or irreverent. But it cannot be true or false. It does not have a truth value not just because an utterance like Was the letter long? does not indicate which letter is being talked about. The indicative The letter was not long...

The aim of this paper is to show that the theory of jet bundles supplies the appropriate setting for the study of Backlund trans- formations. These transformations are used to solve certain partial differential equations, particularly non-linear evolution equations. Of course jets have been employed for some time in the theory of partial differential equations, but so far little use has been made of them in applications. In the meanwhile, substantial progress has been made in the study of non-linear evolution equations. This work has been encouraged by the dis- covery of remarkable properties...

The essays in this book deal with a number of problems in the analysis of intensional language - more especially with the analysis of the personal modalities in natural language. Together they cover a representative spectrum of the problems of contemporary, interest in this area, in a way that should make them of interest to linguists, logicians and philosophers concerned with natural language. The contributors are mostly more linguists than logicians or philosophers but some are more logicians or philosophers than linguists. As far as possible, we have tried to conduct the discussion in...

The selection of papers reprinted here traces the development of syntax from structural linguistics through transformational linguistics to operator gram mar. These three are not opposing views or independent assumptions about language. Rather, they are successive stages of investigation into the word combinations which constitue the sentences of a language in contrast to those which do not. Throughout, the goal has been to find the systemati cities of these combinations, and then to obtain each sentence in a uniform way from its parts. In structural analysis, the parts were words (simple or...

I n order to appreciate properly what we are doing in this book it is necessary to realize that our approach to linguistic theorizing differs from the prevailing views. Our approach can be described by indicating what distinguishes it from the methodological ideas current in theoretical linguistics, which I consider seriously misguided. Linguists typically construe their task in these days as that of making exceptionless generalizations from particular examples. This explanatory strategy is wrong in several different ways. It presupposes that we can have "intuitions" about particular...