Online research in philosophy

In this paper I consider two strategies for providing tenseless truth-conditions for tensed sentences: the token-reflexive theory and the date theory. Both theories have faced a number of objections by prominent A-theorists such as Quentin Smith and William Lane Craig. Traditionally, these two theories have been viewed as rival methods for providing truth-conditions for tensed sentences. I argue that the debate over whether the token-reflexive theory or the date theory is true has arisen from a failure to distinguish between conditions for the truth of tensed tokens and conditions for the truth of propositions expressed by tensed tokens. I demonstrate that there is a true formulation of the token-reflexive theory that provides necessary and sufficient conditions for the truth of tensed tokens, and there is a true formulation of the date theory that provides necessary and sufficient conditions for the truth of propositions expressed by tensed tokens. I argue that once the views are properly formulated, the A-theorist’s objections fail to make their mark. However, I conclude by claiming that even though there is a true formulation of the token-reflexive theory and a true formulation of the date theory, the New B-theory nonetheless fails to provide a complete account of the truth and falsity of tensed sentences.

Quentin Smith has argued that the new tenseless theory of time is faced with insurmountable problems and should be abandoned in favour of the tensed theory of time. Smith;s main argument attacks the fundamental premise of the tenseless theory: that tenseless truth conditions for tokens of tensed sentences adequately capture the meaning of tensed sentences. His position is that tenseless truth conditions cannot explain the logical relations between tensed sentences, thus the tensed theory must be accepted. Against Smith, this paper adopts an alternative approach to the explanation of the entailment relations between sentences which contain indexicals. The approach drops the reliance upon tokens and instead relies on the evaluation of sentence types with respect to a context rather than upon actual or possible utterances of tokens of the types. This (new) version of the tenseless theory of time can adequately explain the relevant entailment relations between tensed sentences.

The use of verbs inflected or modified for tense, and temporal adverbs, indexicals, and quantifiers, pervades everyday speech. Getting clearer about their semantics not only promises to help us to understand how we understand each other, but is also a step toward clarifying the nature of time and temporally located thoughts. The goal of this chapter is to investigate, from the standpoint of truth-theoretic semantics, English tense, temporal designators and quantifiers, and other expressions we use to relate ourselves and other things to the temporal order. Truththeoretic semantics provides a particularly illuminating standpoint from which to discuss issues about the semantics of tense and their relation to thoughts at, and about, times. Tense, and temporal modifiers, contribute systematically to conditions under which sentences we utter are true or false. A Tarski-style truth-theoretic semantics, by requiring explicitly represented truth conditions, helps to sharpen questions about the function of tense and to deepen our insight into the contribution the tenses and temporal modifiers make to what we say by using them. We are interested in a semantic, rather than syntactic, phenomenon. Although tense is identified traditionally with verb inflection, our concern is with linguistic devices used for indicating a time interval, relative to or in which a state or activity is to be understood to occur or obtain. For ease of exposition, we will press ‘tense’ into use to cover any verb form used to indicate time intervals in which the event or state expressed by a verb is to occur or obtain. In English, verb inflection, such as adding ‘-ed’ to a bare infinitive, is one such device. But the phenomenon occurs..

McTaggart famously argued that time is unreal. Today, almost no one agrees with his conclusion. But his argument remains the locus classicus for both the A-theory and the B-theory of time. I show how McTaggart’s argument provided the impetus for both of these opposing views of the nature of time. I also present and defend what I take to be the correct view of the nature of time.

I first distinguish several notions that have traditionally been conflated (or otherwise neglected) in discussions of the metaphysics of time. Thus, for example, I distinguish between the passage of time and temporal becoming. The former is, I maintain, a confused notion that does not represent a feature of the world; whereas a proper understanding of the latter provides the key for a plausible and comprehensive account of the nature of temporal reality. There are two general classes of views of the nature of temporal reality; proponents of particular views in both classes attempt to account for the phenomenon of temporal becoming in terms of qualitative change. I argue that any such account – in terms of change – is irredeemably problematic. And so I propound a different account of temporal becoming, based on the notion that temporal reality is transient, which provides the means to characterize intuitively and vividly the significant effects of time on the metaphysical nature of the world.

The only obligatory temporal expression in English is tense, yet Hans Reichenbach (1947) has argued convincingly that the simplest sentence is understood in terms of three temporal notions. Additional possibilities for a simple sentence are limited: English sentences have one time adverbial each. It is not immediately clear how to resolve these matters, that is, how (if at all) Reichenbach's account can be reconciled with the facts of English. This paper attempts to show that they can be reconciled, and presents an analysis of temporal specification that is based directly on Reichenbach's account.Part I is devoted to a study of the way the three times—speech time, reference time, event time—are realized and interpreted. The relevant syntactic structures and their interaction and interpretation are examined in detail. Part II discusses how a grammar should deal with time specification, and proposes a set of interpretive rules. The study offers an analysis of simple sentences, sentences with complements, and habitual sentences. It is shown that tense and adverbials function differently, depending on the structure in which they appear. The temporal system is relational: the orientation and values of temporal expressions are not fixed, but their relational values are consistent. This consistency allows the statement of principles of interpretation.

Leibniz's philosophy of time, often seen as a precursor to current forms of relationalism and causal theories of time, has rightly earned the admiration of his more recent counterparts in the philosophy of science. In this article, I examine Leibniz's philosophy of time from a new perspective: the role that tense and non-tensed temporal properties/relations play in it. Specifically, I argue that Leibniz's philosophy of time is best (and non-anachronistically) construed as a non-tensed theory of time, one that dispenses with tensed temporal properties such as past, present, and future. In arguing for this thesis, I focus on the three facets of Leibniz's philosophy most relevant for evaluating his commitment to a B-theory of time: (1) the nature of change, (2) the reality of the future, and (3) the truth-conditions for tensed temporal statements. Despite prima facie evidence to the contrary, I show that a close examination of Leibniz's views on these topics provides compelling evidence for interpreting his philosophy of time as a B-theory of time.

If, as the new B-theory of time maintains, tensed sentences have tenseness truth conditions, it follows that it is possible for two sentence-tokens to have the same truth conditions but different meanings. This conclusion forces a rethink of the traditional identification of truth-conditions with meaning. There is an aspect of the meanings of tensed sentences that is not captured by their truth conditions, and that has so far eluded explanation. In this paper I intend to locate, examine, and explain this feature of tensed meaning.

How is temporal information conveyed in language? In languages with tense it is direct; without tense, inference allows the receiver to arrive at an indirect temporal interpretation. I will discuss tensed and tenseless languages, proposing a unified approach that applies to both. I show that a few very general pragmatic principles account for temporal interpretation, direct and indirect.1 I assume that understanding a sentence requires that the receiver locate an event or state, spatially and temporally: time is one of the basic coordinates for truth conditional assessment. Sentences in all languages convey information that allows us to determine the temporal location of the situation expressed. One would like to understand how this happens. The pragmatic principles that I suggest constrain direct temporal interpretation and guide indirect. In languages with tense, tense gives direct temporal information; however certain apparent possibilities do not arise, due to the pragmatic constraints. In languages without tense, inference allows temporal interpretation. The key point in such languages..

In response to a recent challenge that the New B-theory of Time argues invalidly from the claim that tensed sentences have tenseless truth conditions to the conclusion that temporal reality is tenseless, I argue that while early B-theorists may have relied on some such inference, New B-theorists do not. Giving tenseless truth conditions for tensed sentences is not intended to prove that temporal reality is tenseless. Rather, it is intended to undermine the A-theorist’s move from claims about the irreducibility of tensed language to the conclusion that temporal reality must be tensed. I then examine how A-theorists have used facts about language in attempting to establish their conclusions about the nature of temporal reality. I take the recent work of William Lane Craig and argue that he implicitly and illicitly moves from facts about temporal language to his conclusion that temporal reality is tensed.