1. Origins
1.1. The divine source
1.2. The natural sound source
1.3. The physical adaptation source
1.4. The genetic source
2. Signals
2.1. communicative
2.2. informative
3. Properties of human language
3.1. Productivity
3.2. Displacement
3.3. Arbitrariness
3.4. Cultural transmission
3.5. Duality
4. Experiments with other animals
4.1. Washoe
4.2. Sarah and Lana
4.3. Nim
4.4. Kanzi
5. LEVELS OF ANALYSIS
5.1. SYNTAX
5.1.1. linguistics forms' relationship
5.2. Semantics
5.2.1. MEANING
5.2.1.1. Associative
5.2.1.2. Conceptual
5.2.2. FEATURES
5.2.2.1. +animate
5.2.2.2. -animate
5.2.2.3. +female
5.2.2.4. -female
5.2.3. ROLES
5.2.3.1. Theme
5.2.3.2. Agent
5.2.3.3. Instrument
5.2.3.4. Experiencer
5.2.3.5. Location
5.2.3.6. Source
5.2.3.7. Goal
5.2.4. LEXICAL RELATIONS
5.2.4.1. Synonymy
5.2.4.2. Antonymy
5.2.4.2.1. Gradable
5.2.4.2.2. Non-gradable
5.2.4.2.3. Reversive
5.2.4.3. Hyponymy
5.2.4.3.1. Hierarchical relationships
5.2.4.4. Prototypes
5.2.4.5. Homophones
5.2.4.6. Homonyms
5.2.4.7. Polysemy
5.2.4.8. Metonymy
5.2.4.9. Collocation
5.2.4.9.1. Corpus Lunguistics
5.3. Pragmatics
5.3.1. CONTEXT
5.3.1.1. Meaning
5.3.1.1.1. Communicated by the speaker
5.3.2. INTERPRETATION
5.3.2.1. listener
5.3.3. INTENED MEANING
5.3.3.1. speaker
5.3.4. CLOSENESS
5.3.4.1. shared experience