Immediately, I could see Marshall thinking about possibilities, advantages and disadvantages, and how to make it work. Then our CTO, Hans Huber, came into the office and Marshall started to sell the idea to him. Skeptical, Hans walked around the room throwing out questions, but surprisingly we found a lot of answers. I was there, part of this incredibly surprising conversation, half-listening to the little voice in my head repeat "there's no way a four-day week is going to happen."