This answer is false you should know that
Speaking a language sets human beings from other animals reason being,
1. We can use abstract. For example, future and past.
2. We can borrow words from different languages.
3. We can be able to invent languages.
Linguist refers to a person who uses languages. He is able to analyse the language context, meaning and its form.
Linguist is well known to analyse language of human beings by way of observing a play between the meaning and the sound.
Hippocrates was the founder of medicine, regarded as the greatest physician of his time, based medical practice on observations of the human body. Where as Herodotus wrote about the wars between Persia and Greece and he became one of the first true historians in Western civilization.
Railroads played the greatest role in the industrial revolution