In the updates, Notch says he's "Removed Herobrine". Notch also replies if you ask if he had a brother, he says "I did, but he is no longer with us.". And sometimes random structures generate with map generation, such as a small brick cave with a human head inside it. Since this evidence, most of us have wondered "Is Herobrine real?". Herobrine could be behind all the creepy noises in our games. We don't know. Most of the community believes it anyway. I do, too. Herobrine generates random binary code, and to survive a Minecraft crash from the code you have to translate it and do what it tells you to do, before it's too late.