This document outlines 6 key characteristics of human language: 1. Productivity/creativity - Humans can talk about topics that are displaced in time or existence through language. 2. Cultural transmission - Language is culturally transmitted from one generation to the next, rather than through heredity. 3. Displacement - Human language can refer to past, future, intangible concepts through words. 4. Arbitrariness - There is no natural relationship between the form of a word and its meaning. 5. Duality - Language operates on a physical sound level and conceptual meaning level simultaneously. 6. Discreetness - Human sounds that make up words can be separated from one