was reading Karl Popper’s Arthur Holly Compton Memorial Lecture at Washington University in St. Louis “Of Clouds and Clocks” delivered in April 1965. and towards the second half of the lecture under section XIV, he described the 4 functions of language, 2 lower (the common things in animal languages and human languages) and 2 higher (which defines human beings), namely,
“the expressive, the signalling, the descriptive, and the argumentative functions”
the lower two functions are always present in a higher function according to Popper.
Photo by Fotografik33 – www.fotografik33.com