> human reasoning probably evolved [...] We can never know, but I personally favour the rise of "handedness" and the tool-making (technological) hypothesis. To

> human reasoning probably evolved [...] We can never know, but I personally favour the rise of "handedness" and the tool-making (technological) hypothesis. To make and use tools, and to transfer the recipes and terminology, we must educate one another. "In the physical adaptation view, one function (producing speech sounds) must have been superimposed on existing anatomical features (teeth, lips) previously used for other purposes (chewing, sucking). A similar development is believed to have taken place with human hands and some believe that manual gestures may have been a precursor of language. By about two million years ago, there is evidence that humans had developed preferential right-handedness and had become capable of making stone tools. Tool making, or the outcome of manipulating objects and changing them using both hands, is evidence of a brain at work." [1] [1] _ https://assets.cambridge.org/97811084/99453/excerpt/9781108499453_excerpt.pdf https://assets.cambridge.org/97811084/99453/excerpt/97811084...