Dolphins have complex language using sound, and they are very distant cousins. The fact that chimps don't talk is likely to be 50% because of inadequate throat

Dolphins have complex language using sound, and they are very distant cousins. The fact that chimps don't talk is likely to be 50% because of inadequate throat construction, and 50% lack of intelligence. Past extinct lifeforms could have easily had vocal cords and intelligence. We just don't know. That's the point of my post. The possibility exists that language first evolved billions of years ago.