Language | Can’t Sleep? Learn How Humans Learned to Talk

You're listening to a podcast about sleep, and the episode begins with an ad for a car-selling service that went so smoothly the host is suspicious. Then, after another ad for carpet and a promotion for Scotland, the host, Benjamin Boscher, begins reading a Wikipedia article on language. The episode is exactly what it says on the tin: a calm, fact-based recitation about what language is, how it works, and how it evolved. There is no interview, no guest, and no argumentative thesis. The central organizing question is simply: What is human language, and how does it differ from other forms of communication?

The Core Definitions and Properties of Language

The episode establishes that human language is a system of grammar and vocabulary used to convey meaning, primarily through speech or sign. It is characterized by two key properties: productivity (the ability to create an infinite number of sentences from a finite set of elements) and displacement (the ability to refer to things not immediately present in time or space). Language is also described as modality independent, meaning it can be encoded through auditory, visual, or tactile stimuli—spoken words, written text, sign language, or braille.