Local hidden-variable theory

Local hidden-variable theory is a way of trying to explain why particles in the universe behave like they do. In this theory, particles are thought to be "hidden" behind a curtain of tiny particles called "hidden-variables". This means that each particle has hidden-variables (like tiny switches) that determine how it will behave in any situation. When scientists study particles, they can't see these hidden-variables, so they don't know why particles act the way they do. But local hidden-variable theory says that these hidden-variables are what are causing particles to act in certain ways. By studying these hidden-variables, scientists may be able to better understand how particles and the universe work.