Filter Bubbles, Trust, and Outliers Back to: Building Recommender Systems with Machine Learning and AI Previous Lesson Exercise Solution: Implement a Stoplist Lesson 6 within section Real-World Challenges of Recommender Systems. You must enroll in this course to access course content. Next Lesson [Exercise] Identify and Eliminate Outlier Users Lesson 8 within section Real-World Challenges of Recommender Systems. You must enroll in this course to access course content.