Show HN: Rebrain.gg – Doom learn, don't doom scroll

A brave builder dropped Rebrain.gg, a site that swaps mindless scrolling for interactive learning powered by an AI “chatbot” (called a large language model) that asks you questions instead of just talking back. But the Hacker News crowd arrived with hot takes and popcorn: some say the “doom learning” pitch falls flat because doomscrolling is about not thinking, and this clearly asks you to think. One commenter snarked that the name doesn’t fit because doomscrolling is just flipping up, not solving quizzes. Another jabbed that the user interface could be fixed in a few prompts, which is both a compliment and the most HN way to throw shade. Meanwhile, a thoughtful critic warned that AI-driven lessons can confidently teach wrong facts, so don’t trade TikTok for trivia if the trivia’s fake. The product advice brigade came out swinging with “make it swipey” and “do True/False cards,” arguing that to beat addictive scrolling, you need tap-tap dopamine, not homework. And because the internet can’t resist a meme, someone suggested using “nano-banana” to auto-create YouTube Shorts to make it more addictive—because obviously the cure for doomscrolling is… more doomscrolling. The drama here isn’t just about features; it’s a bigger fight over whether learning apps should chase engagement like TikTok or protect accuracy like a textbook. Welcome to the brains-versus-thumbs showdown.