Donald Davidson was an American philosopher who studied how people think and talk about the world. He noticed that when we talk to each other, we use language to describe and explain how things are. He believed that language can help us understand how people think and how they act. Davidson thought that language could be used to figure out how we reach decisions and understand our environment. He also said that language is a way for us to communicate our thoughts and feelings with each other. Basically, Donald Davidson studied how language can help us understand things and communicate with others.