Conditional sentences are among the most intriguing and puzzling features of language, and analysis of their meaning and function has important implications for, and uses in, many areas of philosophy. Jonathan Bennett, one of the world's leading experts, distils many years' work and teaching into this Philosophical Guide to Conditionals, the fullest and most authoritative treatment of the subject. An ideal introduction for undergraduates with a philosophical grounding, it also offers a rich source of illumination and stimulation for graduate students (...) and professional philosophers. (shrink)

The overall strategy of Lycan’s paper is to distinguish three kinds of conditional assertion theories, and then to show, in order, how they are variously afflicted by a set of problems. The three kinds of theory were the Quine-Rhinelander theory (or the Simple Illocutionary theory), The Semanticized Quine-Rhinelander, and the No Truth Value theory (or NTV). This strategy offers considerable clarity, but it comes at a cost, for what I take to be the best version of a conditional assertion theory (...) contains core parts of all three theories. In what follows, I will suggest that many of the objections offered by Lycan can be dealt when all the pieces are taken into consideration at the same time. But I will also suggest that a refined version of what Lycan called the Immediate Implausibility objection does show us that the conditional assertion theory is false. (shrink)

This book looks at the ways in which conditionals, an integral part of philosophy and logic, can be of practical use in computer programming. It analyzes the different types of conditionals, including their applications and potential problems. Other topics include defeasible logics, the Ramsey test, and a unified view of consequence relation and belief revision. Its implications will be of interest to researchers in logic, philosophy, and computer science, particularly artificial intelligence.

Anankastic conditionals are analyzed in terms of events conceived as sequences of snapshots – roughly, comics. Quantification is applied not to worlds (sets of which are customarily identified with propositions) but to strings that record observations of actions. The account generalizes to other types of conditionals, sidestepping certain well-known problems that beset possible worlds treatments, such as logical omniscience and irrelevance. A refinement for anankastic conditionals is considered, incorporating action relations.

This paper is obsolete. It is superceded by the book, Conditionals in Context, MIT Press, 2005.

The paper focuses on the difference between eventconditionals and premiseconditionals. An eventconditional contributes to event structure: it modifies the main clause event; a premiseconditional structures the discourse: it makes manifest a proposition that is the privileged context for the processing of the associated clause. The two types of conditional clauses will be shown to differ both in terms of their 'external syntax' and in terms of their 'internal syntax'. The peripheral structure of event conditionals will be shown to lack the (...) functional head Force, which encodes illocutionary force. Event conditionals are merged inside the IP of the matrix clause. Premiseconditionals contain the head Force and they are merged outside the associated CP. (shrink)

Four different conditionals were known to the Stoics. The so-called ‘first’ (Philonian) conditional has been interpreted fairly uncontroversially as an ancient counterpart to the material conditional of modern logic; the ‘fourth’ conditional is obscure, and seemingly of little historical interest, as it was probably not held widely by any group in antiquity. The ‘second’ (Diodorean) and ‘third’ (Chrysippean) conditionals, on the other hand, pose challenging interpretive questions, raising in the process issues in philosophical logic that are as relevant today as (...) they were then. This paper is a critical survey of some modern answers to four of the most tantalizing of these questions; the issues that I will discuss arise out of interpretations of the Diodorean and Chrysippean conditionals as expressions of natural law, and as strict implications. I will reject these interpretations, concluding with my own proposal for where they should be located on a ‘ladder’ of logical strength. The following passage from Sextus will form the basis of my discussion (from Outlines of Pyrrhonism [Pyrrhoneae Hypotyposes], as presented by Long and Sedley 1987b, 211). He has just introduced Philo’s account of “a sound conditional”—by which I understand a true conditional—with the example “when it is day and I am talking, ‘If it is day, I am talking’”. He then continues. (shrink)

In his (1981) paper, Stalnaker has revised his old theory of conditionals and has given the revision an interesting defense. Indeed, Stalnaker shows that this new theory meets the standard objections put to the old. However, I argue that the revision runs into difficulties in the context of quantum mechanics: If Stalnaker's theory of the conditional is assumed, then from plausible assumptions certain Bell-like conflicts with experiment can be derived. This result, I go on to argue, is a good reason (...) to reject Stalnaker's theory, at least for the quantum mechanical context. (shrink)

This collection brings together some of Frank Jackson's most influential essays on mind, action, conditionals, method in metaphysics, and ethics. These have each been revised for this edition, and are presented along with his challenge to orthodoxy on the new riddle of induction.

Higginbotham (1986) argues that conditionals embedded under quantifiers (as in ‘no student will succeed if they goof off’) constitute a counterexample to the thesis that natural language is semantically compositional. More recently, Higginbotham (2003) and von Fintel and Iatridou (2002) have suggested that compositionality can be upheld, but only if we assume the validity of the principle of Conditional Excluded Middle. I argue that these authors’ proposals deliver unsatisfactory results for conditionals that, at least intuitively, do not appear to obey (...) Conditional Excluded Middle. Further, there is no natural way to extend their accounts to conditionals containing ‘unless’. I propose instead an account that takes both ‘if’ and ‘unless’ statements to restrict the quantifiers in whose scope they occur, while also contributing a covert modal element to the semantics. In providing this account, I also offer a semantics for unquantified statements containing ‘unless’. (shrink)

Unconditionals are syntactic conditionals whose affirmation affirms their consequent, unconditionally. Prominent instances were addressed by J.L. Austin ('There are biscuits if you want some') and Nelson Goodman (even-if 'semifactuals'). Their detailed features are explained in a Decision-Theoretic Semantics (DTS) which extends, by certainty and relevance conditions, the "CCCP" conditional probability construal of conditionals due to Ernest Adams and others. The construal of assertions of conditionals as conditional acts, defended by Keith DeRose and Richard Grandy in 1999 against objections arising from (...) Austin's unconditionals, is shown to be incompatible with any known version of CCCP. However, an ad-hoc decision-theoretic construal of their proposal is seen to work for Austin's unconditionals, albeit for these only. The DTS account of unconditionals hinges on stochastic independence or irrelevance conditions. For Austin's variant, it also involves changes in the expectations of non-indicator random variables, i.e. properly valuational relevance relations. The widely assumed speaker's knowledge presumption for assertion in general is reconstrued non-transcendently as a proposal to update to ostensible common certainty. This imperative replaces the factive 'T-axiom', KA-> A, of modal logical explications of knowledge to yield an doxastically imperatival, but evidence-sensitive theory of assertoric truth claims. On such a basis, Max Black's and G.E. Moore's ostensibilist account of assertors representing themselves as knowing is defended against Tim Williamson's 1996 and Igor Douven's 2006 respective deontic proposals for a knowledge or rational credibility requirement. Moreover, ostensibly unconditional, unhedged assertion is reconciled with a reality of dimly perceived potential defeaters on recognizing it to be a tacit semifactual, if need be. (shrink)

This essay proposes a semantic analysis of biscuit-conditionals, such as Austin’s classic example “there are biscuits in the cupboard if you want some”. The analysis is grounded on the ideas of contextual restrictions, and of non-character encoded aspects of meaning, and provides a rigorous framework for the widespread intuitions that (i) the if-clause in a biscuit-conditional is truth-conditionally idle, but (ii) it ‘qualifies’ the speech-act in question. In the concluding section of this essay, the analysis is also applied to the (...) importantly similar phenomenon of speech-act adverbs. (shrink)

An illustrious line-up of seventeen philosophers from the USA, the UK, and Australia present new essays on themes from the work of Frank Jackson, which bridges mind, language, logic, metaphysics, and ethics. Central to Jackson's work is an approach to metaphysical issues built on the twin foundations of supervenience and conceptual analysis. In the first part of the book six essays examine this approach and its application to philosophy of mind and philosophy of color. The second part focuses on Jackson's (...) highly influential work on phenomenal consciousness. The third part is devoted to Jackson's work in ethics, both normative ethics and metaethics. The last three papers discuss Jackson's ground-breaking work on conditionals. The final section of the book comprises a substantial essay by Jackson in reply to his critics: this offers some of the clearest expressions of the ideas which Jackson has brought to the fore in philosophy. (shrink)

Eleven distinguished philosophers have contributed specially written essays on a set of topics much debated in recent years, including physicalism, qualia, semantic competence, conditionals, presuppositions, two-dimensional semantics, and the relation between logic and metaphysics. All these topics are prominent in the work of Robert Stalnaker, a major presence in contemporary philosophy, in honor of whom the volume is published. It also contains a substantial new essay in which Stalnaker replies to his critics, and sets out his current views on the (...) topics discussed. (shrink)

This article introduces the classic accounts of the meaning of conditionals (material implication, strict implication, variably strict conditional) and discusses the difference between indicative and subjunctive/counterfactual conditionals. Then, the restrictor analysis of Lewis/Kratzer/Heim is introduced as a theory of how conditional meanings come about compositionally: if has no meaning other than serving to mark the restriction to an operator elsewhere in the conditional construction. Some recent alternatives to the restrictor analysis are sketched. Lastly, the interactions of conditionals (i) with modality (...) and (ii) with tense and aspect are discussed. Throughout the advanced research literature is referenced while the discussion stays largely non-technical. (shrink)

At first glance, this is an entirely unremarkable kind of sentence. It is easy to find naturally occuring exponents. Its meaning is also clear: taking the A train is a necessary condition for going to Harlem. Hence the term “anankastic conditional”, Ananke being the Greek protogonos of inevitability, compulsion and necessity.

1. Plot..................................................................................................................................1 2. What is an anankastic conditional? ..................................................................................3 3. Previous Analyses of Anankastic Conditionals.................................................................5..

The object of our investigation is expressing necessary conditions in natural language, particularly in a certain kind of conditional sentences, the so-called Anankastic Conditionals (ACs)2, a topic brought into the linguistic discussion by the seminal papers (Sæbø, 1986) and (Sæbø, 2001). A typical AC is the following sentence, Sæbø’s standard example: (1) If you want to go to Harlem, you have to take the A train. Sæbø analyses the sentence by means of the modal theory in (Kratzer, 1981), according to (...) which a modal has two contextual parameters, a modal base f(w) and an ordering source g(w). The modal base contains relevant facts and the ordering source contains an ideal like wishes, moral laws and the like. Normally, the antecedent of a necessity-conditional is added to the modal base. Sæbø’s new proposal for the analysis of the AC is that the antecedent without the information ‘you want’, called inner antecedent, is added to the ordering source. (shrink)

Book Information Real Conditionals. By William Lycan. Clarendon Press. Oxford. 2001. Pp. 234. Hardback, £25.

Conditionals has at its center an extended essay on this problematic and much-debated subject in the philosophy of language and logic, which the widely respected Oxford philosopher Michael Woods had been preparing for publication at the time of his death in 1993. It appears here edited by his eminent colleague David Wiggins, and is accompanied by a commentary specially written by a leading expert on the topic, Dorothy Edgington. This masterly and original treatment of conditionals will demand the attention of (...) all philosophers working in this area. (shrink)