Language is the primary way humans gain information about the world. It has mutually agreed upon rules and grammar, and is intended to be creative and open-ended. There are debates around whether animals can truly communicate through language. There are also debates around the theories of how words gain meaning, including definition theory, denotation theory, and image theory. Language can be ambiguous, vague, use metaphor and irony, leading to potential misunderstandings. The Sapir-Whorf hypothesis proposes that language shapes thought, while critics argue thought can exist independently of language.