"A high-trust intellectual sparring partner"

My measure for an account's value is what happens after I read their posts. Most fade instantly. With Sergey, I find his framing of a problem sticks with me, forcing me to reconsider my own assumptions. A DM with him isn't about getting an answer, it's an intellectual recalibration. He doesn't tell you what to think; he offers the help you to see the problem more clearly yourself. That's an impossibly rare and valuable quality on this platform