Way to exchange info, communicate, associating a symbol with meaning, language can show status. A system of words or signs used for expression. It shows the human mind: properties of language: Idiolect- every human has their own spin on a language. Dialects of the same language are generally mutually intelligible. Language- no strong line as to what separates a language from another; very political. Some dialects are less mutually intelligible than some languages. So linguistics is the scientific study of language. Linguists observe, not prescribe: there is no bad grammar to a linguist, there is just the grammar used. The only problem is that one side is more common, and therefore perceived as better This variability is important, it means that the language is alive. Language death occurs when it is no longer spoken. Paradolia- we see faces where there are none. This is due to how we see patterns.