Definition:
A presupposition trigger is a linguistic expression (word, construction, or grammatical structure) that causes a sentence to take certain information as given — assumed to be true regardless of whether the sentence is affirmed, negated, or questioned. “She stopped smoking” presupposes “She was smoking” — and crucially, “She didn’t stop smoking” also presupposes “She was smoking.” The presupposition survives negation, which distinguishes it from entailment.
In-Depth Explanation
Key property — survival under negation:
- Entailment: “She killed the fly” entails “The fly is dead” — but “She didn’t kill the fly” does NOT entail “The fly is dead”
- Presupposition: “She stopped smoking” presupposes “She was smoking” — AND “She didn’t stop smoking” ALSO presupposes “She was smoking”
This negation test is the primary diagnostic for presupposition.
Common presupposition triggers:
| Trigger Type | Example | Presupposition |
|---|---|---|
| Change-of-state verbs | “He stopped running.” | He was running. |
| Factive verbs | “She realized she was late.” | She was late. |
| Definite descriptions | “The king of France is bald.” | There is a king of France. |
| Cleft sentences | “It was John who broke it.” | Someone broke it. |
| Temporal clauses | “Before she left, she called.” | She left. |
| Iteratives | “He did it again.” | He did it before. |
| Implicative verbs | “She managed to escape.” | It was difficult to escape. |
| Comparatives | “He’s taller than his brother.” | He has a brother. |
| Questions | “When did you stop?” | You were doing it. |
| Counterfactuals | “If I were rich, I’d travel.” | I am not rich. |
Why presupposition triggers matter for language learners:
- Comprehension: Presuppositions carry information that isn’t stated explicitly. If you don’t recognize the presupposition in “When did you stop studying Japanese?”, you miss the embedded claim that you were studying Japanese.
- Pragmatic manipulation: Presuppositions can be used persuasively. “Have you stopped cheating on exams?” presupposes you were cheating — a classic loaded question. Recognizing this is a critical discourse literacy skill.
- Cross-linguistic variation: Different languages trigger presuppositions differently. Japanese topic marker は (wa) can carry presuppositional weight:
魚は食べません (Sakana wa tabemasen) = “Fish, (I) don’t eat” → presupposes other food is eaten; topic marker creates a contrast
Related Terms
See Also
Research
- Levinson, S. C. (1983). Pragmatics. Cambridge University Press. — Chapter on presupposition covers all major trigger types with examples and formal analysis.
- Beaver, D. I., & Geurts, B. (2014). Presupposition. In E. N. Zalta (Ed.), Stanford Encyclopedia of Philosophy. — Comprehensive philosophical and linguistic treatment of presupposition and its triggers.