Applying the maxims
Grice (1975) gives several examples of inferences that appear to result from the maxims, given particular utterances. These inferences are called conversational implicatures. Here, I’ll give a few of my own.
Manner
Here’s one:
- Bo walked to his desk, sat down, and got up.
This sentence, when uttered, appears to imply that Bo first walked to his desk, then sat down, and then got up, rather than that he might have done these things in some other order; though, people tend to say that (1) is still true, even if he did. This inference might be viewed as arising from the maxim of Manner, insofar as this maxim prescribes that the order in which predicates describing events are conjoined should mirror the order in which the events described are implied to have transpired.
Why would the maxim of Manner prescribe this? Not totally obvious, perhaps; but one idea might be that understanding an event description involves, in some sense, constructing a mental representation of the event which is being described. And it might be easier for people to update mental representations of sequences of events with new events that are hypothesized to occur later in time than any events currently in the sequence than it is for people to update such sequences with new events that are hypothesized to occur earlier in time than some events currently in the sequence. If this is true, and people (implicitly) know that it is true, then they might try to make their utterances easier to understand, in view of this general fact; that is, they might try to utter event descriptions in an order that allows people to more easily update their existing mental representation with a representation of a new event.
To be sure, the above unruly musings should actually be clarified and spelled out—ideally in terms of some precise cognitive architecture and theory of language processing (e.g., stated in the ACT-R framework).
Quantity
Here’s an example which appears to rely on Quantity:
- Jo did some of the readings.
An utterance of this sentence seems to imply that Jo did not do all of the readings. One might reason about why this inference is produced as follows:
- The person making the utterance usually follows Quantity, and therefore provides as much information as needed (say, given the QUD).
- They opted not to make the stronger statement that Jo did all of the readings.1
- Therefore, another principle—in particular, Quality (which they also follow)—must have prevented them from uttering this stronger sentence: they must not have enough evidence that Jo did all of the readings; perhaps they believe it is false.
In case the inference made from this reasoning is merely that the speaker doesn’t have enough evidence to use all instead of some, one would conclude that there is an intended ignorance implicature: the speaker doesn’t know whether or not Jo did all of the readings, which is why they opted for the weaker some. In case the inference made is that the speaker believes it is false that Jo did all of the readings, one draws a scalar implicature: the speaker believes Jo did not do all of the readings, which is why they opted for the weaker some.
Note that this situation seems to differ slightly from one in which Bo makes the utterance in (3).
- Jo: What do you want?
Bo: Something with a lot of caffeine.
Here, we don’t get the inference, say, that Bo doesn’t want a matcha latte, or that Bo doesn’t want a cappuccino, both of which would entail that he wants something with a lot of caffeine, and which therefore constitute stronger statements. Instead, we seem to observe an ignorance implicature; i.e., that Bo doesn’t know what he wants (he knows only that it should contain caffeine).
Relation
Recall the interaction in which Jo and Bo are outside a coffee shop, looking in through the window.
- Jo: There’s no one at the cash register.
Bo: The lights are on.
Here, it’s easy to draw the inference that Jo thinks the coffee shop might be closed, as well as the inference that Bo thinks it might be open. We might use Relation to help explain these inferences if we assume that Jo and Bo are addressing the question of whether or not the coffee shop is open and, hence, are attempting to make utterances which are relevant to this question. If so, then Jo can be understood as offering up evidence for the coffee shop being closed, while Bo can be seen as providing evidence that it is open.
References
Footnotes
When I say that Jo did all of the readings is stronger than Jo did some of the readings, what I mean is that the first sentence entails the second sentence, but the second does not entail the first. Viewing things from the other direction, one can say that Jo did some of the readings is weaker than Jo did all of the readings. ↩︎