system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do all of my necklaces get tangled when they're just sitting in a jewelry box all of the time?
gpt
There was an ignoble prize a few years ago for answering a similar question. It was for proving that string like objects will inevitably tangle.

The short version is this. With some movement of the strings there are very few ways the string can sit that isn't tangled, while there an almost infinite number of ways for the string to sit that is tangled. The difference in the number of ways the string can lie tangled vs untangled is so large that it ends up having a 100% chance of tangling.

For the jewelry box, opening and closing the lid/drawer, or disturbing the box while putting in or taking out jewelry would cause enough movement of other jewelry in the box to cause them to tangle over time.