6.13 Presupposition in Discourse

Presupposition in Discourse refers to the implicit assumptions or background beliefs that speakers and listeners rely on for communication to be meaningful and coherent. These assumptions are taken for granted within an utterance and must be accepted as true for the utterance to make sense or to be felicitous in a given context. Unlike explicit statements, presuppositions are not directly asserted but are embedded within the structure of the discourse, shaping interpretation and guiding interaction.

Nature of Presupposition

Presuppositions function as a form of shared knowledge or mutual understanding that interlocutors assume to hold prior to and during communication. They underpin the pragmatic dimension of language by providing a common ground that aids in the interpretation of utterances beyond their literal meaning.

Presuppositions differ from entailments and implicatures in that they are stable across affirmative and negative forms of a sentence. For example, the sentence "John stopped smoking" presupposes that John used to smoke, and this presupposition remains even if the sentence is negated ("John did not stop smoking").

Types of Presuppositions

Existential Presupposition

This type involves the assumption that certain entities or individuals exist in the context or world of discourse. For example, "The king of France is bald" presupposes the existence of a king of France.

Factive Presupposition

Factive verbs and expressions (e.g., "know," "regret," "realize") presuppose the truth of the embedded clause. For instance, "She knows that the meeting is at noon" presupposes that the meeting is indeed at noon.

Lexical Presupposition

Certain words carry presuppositions as part of their lexical meaning. For example, the verb "stop" presupposes a prior ongoing action ("stop smoking" presupposes smoking was occurring).

Structural Presupposition

Syntactic constructions can trigger presuppositions. Examples include cleft sentences ("It was John who broke the vase" presupposes that someone broke the vase) and questions ("Have you stopped running?" presupposes that the person used to run).

Counterfactual Presupposition

Conditional statements or subjunctive moods often presuppose that the condition is false or contrary to fact. For example, "If I had left earlier, I would have caught the train" presupposes that I did not leave earlier.

Functions and Roles in Discourse

Presuppositions facilitate efficient communication by allowing speakers to convey information without explicitly stating everything. They help maintain coherence by anchoring new information to shared assumptions. Presuppositions also play a crucial role in managing politeness, indirectness, and implicature, as speakers can imply sensitive or controversial information subtly through presupposition.

Moreover, presuppositions are central in discourse analysis and pragmatics because they reveal underlying power dynamics, cultural norms, and background ideologies. By analyzing which presuppositions are accepted, challenged, or ignored, one can infer the interpersonal and social context of communication.

Presupposition Triggers in Language

Certain linguistic elements consistently give rise to presuppositions, known as presupposition triggers. These include:

• Definite descriptions ("the president," "the book")
• Iteratives ("again," "still")
• Temporal clauses ("before," "after")
• Change of state verbs ("stop," "start," "continue")
• Factive verbs ("know," "realize," "regret")
• Cleft constructions ("it is... that...")
• Implicative verbs ("manage to," "fail to")
• Questions and comparatives

Understanding these triggers is key to identifying presuppositions within discourse and analyzing their effects on meaning and interpretation.

Presupposition Accommodation and Failure

When a presupposition is not part of the listener’s common ground, accommodation occurs, which is the process by which the listener adjusts their assumptions to accept the presupposed information. This adjustment allows communication to proceed smoothly despite gaps in shared knowledge.

However, presupposition failure happens when accommodation is impossible or rejected, leading to confusion, misunderstanding, or communication breakdown. For example, uttering "The king of France is bald" in a contemporary context where there is no king of France results in presupposition failure, as the presupposed entity does not exist.

Interaction with Other Pragmatic Phenomena

Presupposition interacts with implicature and entailment to build complex layers of meaning in discourse. While entailments are logical consequences of a statement and implicatures are inferred meanings based on conversational principles, presuppositions are background assumptions necessary for utterance felicity.

The interplay between these phenomena shapes how meaning is negotiated dynamically in conversation, influencing inference, presumption, and contextual adjustment.

Visualizing Presupposition in Discourse

A simplified representation of the flow of presupposition in discourse can be outlined as follows:

This diagram illustrates how an utterance by the speaker activates presupposition triggers, which in turn rely on the listener’s assumptions or common ground to interpret the message properly.

Summary

Presupposition in discourse is a foundational pragmatic phenomenon where implicit assumptions underlie spoken or written communication. Recognizing presuppositions, their triggers, and their role in discourse coherence enhances the understanding of how meaning is constructed and negotiated between interlocutors. The dynamic processes of accommodation and failure highlight the interactive nature of presuppositions and their impact on successful communication.