Sign

: It challenges the idea that sign languages are "just" gestures and explores how the visual nature of signing allows for more direct meaning than spoken sounds. The full text is available via Frontiers in Psychology .

3. Comparing Visual vs. Spoken Language (Psychology/Linguistics) : It challenges the idea that sign languages

: 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) Comparing Visual vs

Humans 40,000 y ago developed a system of conventional signs : It challenges the idea that sign languages

: 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 .