system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5, if the oldest movable printing press exists in Korea, so does the oldest books from the printing press... why are the Germans credited with ‘inventing’ it?
gpt
There were limited uses of it in China and Korea, but the Germans are the ones who really made mass production viable, kicking off the age of the mass-printed book. One big help is that they only needed the letters of the alphabet, so they could just make molds for only that many letters to make a huge amount of type for printing.