The document discusses how to convince managers to have a full-time ScrumMaster. It provides several arguments for doing so, including: explaining how a ScrumMaster can double a team's velocity in 6 months and increase value; comparing it to high-performing sports teams that have full-time coaches; and suggesting running an experiment to prove the value. It also addresses potential issues like ensuring the ScrumMaster and team are ready, developing additional ScrumMasters, and identifying the most impactful impediments to address.