Schroedinger’s avocado: you’re thinking about guacamole. There’s an avocado on the refrigerator. Someone may or may not have already made guacamole. Until you open the refrigerator door to check, the avocado exists simultaneously as both whole AND all mashed up. Kinda like Schroedinger’s cat, only tastier.
Writes all the things. Most of the things never write back.