Manjul Bhargava says only half done around [54:39](https://youtu.be/yvHrn-41XMU?t=3268) of the video [Manjul Bhargava, Steven Strogatz, Matt Brown and Lynn Sherr — The Infinite Mind](https://www.youtube.com/watch?v=yvHrn-41XMU) from March 2016.