The Non-Canon Expert looks at the extent of Darth Vader’s knowledge of the Rule of Two from both a Canon and Legends perspective, explaining whether Vader knew what the Rule of Two was and why it was established by the Sith Order. This video looks at both the Canon and Legends answer to this question, using a number of sources from both, but primarily the «Book of Sith» and the novel «The Rise and Fall of Darth Vader» for the Legends material and Issue #20 of the 2015 Canon Darth Vader comic and the novel «Star Wars: Thrawn: Alliances» for the Canon material. I hope that you enjoy it!