Synchronicity: The Nature of Speaking in Concert

You may remember in primary school during the assemblies in the morning. Whoever was hosting the assembly was a good morning, children. And the children respond by saying, good morning, Mr. O'Brien, in this weird kind of melody. Where did that come from? Why did people across the country in primary schools think good morning back like that? I think that it is the nature of speaking in concert, isn't it? Because otherwise it would be disparate. Synchronicity. That's the answer.