10.5 - Impossibility Results for Independence-Based and Nonparametric Causal Discovery

[@robertorossignoli3974]

Hello, first of all thanks for your great content! I have a question. In slide 29 you mention that a Linear Gaussian Structural model can not be uniquely identified. Still, in Peters & Bühlmann 2014, they claim this structure can be identified (if error variances are equal). Am I missing something?