Title: Discussion
Course: Advanced Data Science: A Graduate Course > Section: Module 4: Supervised learning: regression and classification

Post your initial contribution by mid-week: name the model family you selected, the single strongest reason you chose it over one rejected alternative, and your current public/private gap, then argue explicitly whether that gap is telling you the model generalized or that you have started to overfit the leaderboard. By the end of the week, reply substantively to two peers, challenge a validation choice, propose a feature or a regularization change, or defend a smaller model against a flashier one on the evidence they reported. The instructor responds in each thread, pressing on leakage, interpretation, and the meaning of the gap.