Answer:
Presupposition and entailment are both concepts in semantics that relate to the meaning of linguistic expressions. While they are related, they differ in their specific focus.
Presupposition refers to the background assumptions or beliefs that are necessary for an utterance to make sense. These assumptions are not explicitly stated in the utterance, but are instead taken for granted by the speaker and listener. In other words, a presupposition is something that is assumed to be true or existing, without the speaker explicitly saying so.
Entailment, on the other hand, refers to the logical relationship between two sentences, where the meaning of one sentence implies the meaning of another sentence. In other words, if a sentence A entails sentence B, then the truth of sentence A guarantees the truth of sentence B.
For example, consider the sentence "John ate some of the cookies." This sentence entails the sentence "Some cookies were eaten by John." This is because the meaning of the first sentence logically implies the meaning of the second sentence. If John ate some of the cookies, then it must be true that some cookies were eaten by John.
In summary, the key difference between presupposition and entailment is that presupposition refers to the background assumptions or beliefs that are necessary for an utterance to make sense, while entailment refers to the logical relationship between two sentences where the meaning of one sentence implies the meaning of another sentence.
Step-by-step explanation: