system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When we dream/daydream how is it we can process the dream in a visual way? 

Ok, so this is kind of a hard question to phrase. What I mean is:

Let's say I'm daydreaming, and in my head I'm imagining this epic battle between a group of orcs and kittens. How does my brain process that information into an almost visual way? It's like I am watching the scene take place in front of me, even though in the back of my head I know it's all in my head.

Hope that makes sense!
gpt
When we see things our eyes are simply relaying data to our brains by electric pulses.  This data stimulates our brains and we "see" things.  Our brains can simulate this when we dream and essentially trick us into "seeing" things.