Thank you for posting this. It was an excellent, well-paced talk. 40 minutes flew right by. The part about three levels of estimation was really eye-opening.

Thank you for posting this. It was an excellent, well-paced talk. 40 minutes flew right by. The part about three levels of estimation was really eye-opening. Even though it's obvious in hindsight, I didn't make the connection until it was spelled out for me.