What if people's dreams were actually alternate realities?

In this world, every time a person goes to sleep, their soul splits from their physical body and goes into an alternate reality version of themselves. Their alternate reality soul is still their actual soul and is the same being as their primary soul just living a different life. <br><br>How do people see alternate realities as dreams, but their primary souls remember them so vividly they can recall the details?<br><br>Use any character's perspective.