1. The document discusses neural networks and their ability to recognize patterns, which could potentially be used to break traditional text-based CAPTCHAs. 2. It then proposes a new 3D CAPTCHA system where users must identify and click on attributes of 3D objects in a scene to solve the CAPTCHA, making it more difficult for neural networks to crack. 3. As machine intelligence increases, tougher CAPTCHAs will need to be developed to distinguish humans from computers on websites.