Sign -

: It suggests that early humans had a shared, intentional system of graphic communication long before formal writing systems like cuneiform existed. You can read the full study at PNAS .

: It explains why a word or image isn't just a thing—it's a tool for meaning that relies entirely on the observer's mind. You can explore a breakdown of his theories at the Stanford Encyclopedia of Philosophy . 2. The Evolution of Human Communication (Archaeology) : It suggests that early humans had a

Humans 40,000 y ago developed a system of conventional signs : It suggests that early humans had a