Paul Grice was a man who really liked to talk about how people communicate with each other. He came up with something called "Grice's principles," which are like rules that people follow when they talk to each other. One of these principles is "be clear," which means you should try to say things in a way that makes sense to the other person. Another is "be relevant," which means you should only say things that relate to what the other person is talking about.
Grice also talked a lot about something called "implicature," which means the meaning behind what people say. For example, if someone says "It's a bit cold in here," they might actually mean "Can you turn up the heat?" Instead of saying that directly, they hint at it through their words. Grice thought it was important to understand these hidden meanings in order to better understand what people are really trying to say.
Overall, Paul Grice was a smart man who studied how people talk to each other and came up with some guidelines to help us communicate better.