Mitchell Green

Frege was the grandfather of analytical philosophy, Husserl the founder of the phenomenological school, two radically different philosophical movements. In 1903, say, how would they have appeared to any German student of philosophy who knew the work of both? Not, certainly, as two deeply opposed thinkers: rather as remarkably close in orientation, despite some divergence of interests. They may be compared with the Rhine and the Danube, which rise quite close to one another and for a time pursue roughly parallel courses, only to diverge in utterly different directions and flow into different seas. Why, then, did this happen? What small ingredient into the thought of each was eventually magnified into so great an effect?

An approach is provided to the prediction and explanation of quantity implicata that, unlike the majority of approaches available, does not construe Quantity as requiring speakers to make the strongest claim that their evidence permits. Central to this treatment is an elaboration of the notion of what a conversation requires as appealed to in the Cooperative Principle and the Quantity maxim. What a conversation requires is construed as depending, at any given point, upon the aim of the conversation taking place, the conversational record, which includes such features as common ground and salience relations among objects, and any proffered illocution calling for a reply. In accounting for this third dimension a partial characterization is provided of the speech acts of assertion and interrogation in terms of their role in constraining the progress of the conversation in which they occur.

Stalnaker’s conception of context as common ground possesses unquestionable explanatory power, shedding light on presupposition, presupposition accommodation, the behavior of certain types of conditionals, epistemic modals, and related phenomena. The CG-context approach is also highly abstract, so merely pointing out that it fails to account for an aspect of communication is an inconclusive criticism. Instead our question should be whether it can be extended or modified to account for such a phenomenon while preserving its spirit. To that end, this essay assesses the prospects of the CG-context approach for making sense of the variety of ways in which interlocutors accept propositions as well as non-propositional contents, some different types of conversation and the norms distinctive of these different types, some pre-illocutionary pragmatic phenomena, conversational injustice, and fictional discourse.

From the point of view of ethics, truthtelling is not a matter of speaking the truth but is rather a matter of speaking what one believes to be the truth. So too liars do not necessarily say what is false; they say what they believe to be false. Further, one can mislead without lying. An executive answering in the affirmative the question whether some employees are in excessive danger on the job will mislead if he knows that in fact most employees are but does not say so. Yet he does not lie. Similarly there is no lie in an advertisement suggesting that those who use a certain product will win garner wealth and power. This article deals with the ethical and practical dimensions of truthtelling and lying only.

Grice's Quantity maxims have been widely misinterpreted as enjoining a speaker to make the strongest claim that she can, while respecting the other conversational maxims. Although many writers on the topic of conversational implicature interpret the Quantity maxims as enjoining such volubility, so construed the Quantity maxims are unreasonable norms for conversation. Appreciating this calls for attending more closely to the notion of what a conversation requires. When we do so, we see that eschewing an injunction to maximal informativeness need not deprive us of any ability to predict or explain genuine cases of implicature. Crucial to this explanation is an appreciation of how what a conversation, or a given stage of a conversation, requires, depends upon what kind of conversation is taking place. I close with an outline of this dependence relation that distinguishes among three importantly distinct types of conversation.