Hmm yes but you know that regex exists, and therefore know enough about it that you know you don't know it. That's how I interpreted this. I was thinking more

Hmm yes but you know that regex exists, and therefore know enough about it that you know you don't know it. That's how I interpreted this. I was thinking more like you don't know that you don't know poop.js because you didn't know about it until I said it just now. Otherwise you'd have continued blissful in your unaware-ness of poop.. AKA you didn't know that you didn't know it.