We can study Linguistics from three parts: introduction to Linguistics, main branches of Linguistics, main theories about Linguistics.
The introduction to Linguistics is made up of design feature of language, language families, important distinctions in Linguistics and scope of Linguistics.
Design features refer to the defining properties of human language that distinguish it from any animal system of communication. The following are the most distinguished properties: creativity, arbitrariness, displacement, cultural transmission and duality.
Creativity, in other words, language can be used to create new meanings because of its duality.
Arbitrariness is the forms of human language demonstrate a property.
Displacement. Language can refer to contexts removed from the immediate situations of the language user. This property of human language is called displacement.
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