Icebergs were not on Phillips to-do list.
I don't agree with point number 3. While it is important to finish the tasks on your to-do list, it is also important to be aware of emerging problems. Phillips was not "goofing off" as might be implied by this point. He had a list of messages to send and by gully he was going to send them, even if it meant forcefully rejecting a message warning him of danger.
Suppose you have to deploy a suite of software to 100 machines, and after the first 20 you start receiving complaints that the deployment is faulty. Do you continue to deploy so you meet your deadline and not catch heck from management, or do you stop the deployment and notify your supervisor? Do you tell the people who are warning you to shut up because you have work to do? You could be ignoring the equivalent of an iceberg for your project.
