I often use GPT by asking it to challenge my thinking with questions, and that worked surprisingly well for clarifying my own ideas. I recently had an interview coming up, so I built this small web app (using Codex) that acts as an interviewer and drills follow-up questions—so I can practice the “go deeper / explain why” pressure.

When I realize I don’t actually know something, I use that gap to study right away. After the session, I can download the transcript and paste it into Notion/Obsidian for review.

It’s currently running on my own API credits, so I’m not sure how long it will stay up. If you try it, I’d really appreciate blunt feedback: Do the follow-up questions feel realistic? What part felt awkward or unhelpful? What’s the one feature you’d expect next?