The document discusses using problem-based learning (PBL) for a wine science bachelor's degree program. It notes that the program has a diverse student body and uses PBL during a required 3-day residential school. For PBL, students are assigned to small groups that work through wine-related problems. They must define the problem, identify knowledge gaps, conduct research to address those gaps, and present their proposed solution to the class. The "Rumsfeld moment" refers to determining what is known versus unknown. Feedback is provided during presentations but no formal assessments are used. The best group size is 4-5 students with a mix of experiences, while large groups or dominant personalities can hamper the effectiveness of PBL