Let's put this in concrete terms, I have 1600 pieces of cardboard, each one only interacts with 4 other pieces of cardboard. In total, they come together to for

Let's put this in concrete terms, I have 1600 pieces of cardboard, each one only interacts with 4 other pieces of cardboard. In total, they come together to form a single, fully functional product which shows the full picture. We literally call this product a puzzle.