A public statement is called a declaration. The words spoken by celebrities are famous sayings, the words of education and supervision are proverbs, the words of exhortation and warning are admonitions, the words of encouragement are gifts, the words of public announcement are declarations, the words of arrogance are crazy words, the words of progress are good words, the words of sustenance and significance are fables, and the words of casual laughter are jokes.

origin of language

The birth of human language can be traced back to 300 thousand years ago. Of course, we can't hear the conversation of primitive people, and we can only look for brain traces related to language. The brain regions related to human language are asymmetrical, and the sulcus in these brain regions often leave marks on the inside of the skull. Asymmetrical impressions on the inside of the skull were found in the skull fossils of Neanderthals 30,000-50,000 years ago and Beijingers 30,000-500,000 years ago.

Sign language was used at the beginning of class, and then audio language was used, freeing hands to do other things. Because most people use their right hand, which is dominated by the left hemisphere of the brain, the advantage of language lies in the left hemisphere.