What are the main ideas and highlights of Gödel, Escher, Bach?

Gödel, Escher, Bach by Douglas Hofstadter describes and defines the concept of recursion, and discusses its applications in computer science, consciousness, art, music, biology and various other fields.

Recursion is crucial to writing computer programs in a compact, elegant way, but it also opens the door to infinite loops and irreconcilable logical contradictions.

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Visual remixes

Long before I got interested in electronic music, I was a fine arts guy. It bothers me that unauthorized appropriation of a music recording will get you sued, but visual artists who appropriate pop cultural materials get into museums and art history textbooks.

Marcel Duchamp

In ancient times and more traditional societies, there was never much importance attached to the concept of sole authorship or ownership of creative works. Widespread belief in the lone Byronic genius didn’t take hold until the eighteenth century in Europe. Duchamp signaled the beginning of the end of the Byronic genius with his readymades, like the infamous urinal, or this bicycle wheel:

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