system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do we “hear” the voice inside our head with no physical sound?
gpt
When you talk and others talk to you, your brain lights up in places that process language. When you have an inner monologue, those same places (and some new ones) in your brain light up. Because the same part of your brain that listens to others is also listening to you, you process it as hearing a voice in your head.