Presupposition

Presupposition refers to the background assumptions or beliefs that must be accepted for a statement to make sense. For example, if someone says, "John's brother is tall," it presupposes that John has a brother. In the context of vagueness, presuppositions can create ambiguity; terms like "tall" can mean different things to different people. This means that understanding a statement often depends on the listener's prior knowledge and assumptions, which can lead to confusion or misinterpretation if those assumptions are not shared or clarified between people.