What does the speaker mean when he says that classical music is “a dialogue between the two powerful sides of our nature: instinct and intelligence”?

The speaker means that classical music is the embodiment of intelligent instincts , this is because classical music is considered a very formal style of music.

Net  the suffix is your .com/.net/.org, and so on, i believe

The "maple leaf rag" (copyright registered on september 18, 1899)[1] is an early ragtime musical composition for piano composed by scott joplin. it was one of joplin's early works, and became the model for ragtime compositions by subsequent composers. it is one of the most famous of all ragtime pieces.[2] as a result joplin was called the "king of ragtime". the piece gave joplin a steady if unspectacular income for the rest of his life.