Presupposition and Entailment

Understanding presupposition and entailment is crucial for sophisticated pragmatic analysis. These concepts reveal how speakers and writers convey meaning not just through what they say explicitly, but through what they take for granted and what logically follows from their utterances. At A-Level, the ability to identify presuppositions and entailments in texts demonstrates a nuanced understanding of how meaning is constructed.

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What Is Presupposition?

A presupposition is something that a speaker or writer takes for granted — an assumption that is treated as already established or uncontroversially true, rather than something being asserted. Presuppositions are backgrounded — they are not the main point of the utterance but form part of the taken-for-granted context.

Consider the sentence: "Have you stopped smoking?"

This question presupposes that the addressee used to smoke. Whether the answer is "yes" or "no," the presupposition that the person was previously a smoker remains in force. This is a key property of presupposition — it survives under negation and questioning.