Jan Leike — Education: PhD in Machine Learning, Australian National University

NoteThe source directly confirms all three components of the claim: (1) Jan Leike holds a PhD from Australian National University, (2) the PhD was supervised by Marcus Hutter, and (3) the research topic was reinforcement learning theory (specifically 'Nonparametric General Reinforcement Learning'). The claim states 'Machine Learning' while the source specifies 'reinforcement learning theory' — this is a minor narrowing/specification rather than a contradiction, as reinforcement learning is a subfield of machine learning. The 2016 date in the source aligns with the PhD completion date.