How did Yoda know about the rule of two?

Qui-Gonns funeral we are all paying our respect to a fallen Jedi then the words come out of Yoda's mouth "Always two there are, a Master and apprentice" Right here is my problem, Yoda is near 900 years old, a hundred years shy of when the Sith were supposedly wiped out from the Galaxy. Yet we know Darth Bane created the Rule of two and only him and Darth Zannah were about. In Rule of two the Jedi think they killed the last two when we know it was a decoy. In Dynasty of Evil there are no Jedi's involved in the story. So with the Sith all dead at Ruusan then they "find" the last Sith, kill them and the galaxy saved. But when did the Jedi find out about the rule of two? that what bugs me. Help me please.
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Master Joined: 22 Dec 2010 Posts: 1796 Location: Carcosa

http://starwars.wikia.com/wiki/Kibh_Jeen

Thank you both for your replies this has cleared my mind. Very Happy

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When I first saw Episode I, I wondered the same but always assumed it was something about a Sith heir letting it slip.
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Master Joined: 22 Dec 2010 Posts: 1796 Location: Carcosa

I think in the Lucasverse the history of Bane is different than the EU in that Bane came along earlier in time (closer to 2,000 BBY) and that the Jedi were aware of the Rule of Two after Bane and that their alleged extinction occurred after Bane.

I always thought the EU was playing with fire by putting the Battle of Ruusan at 1,000 BBY precisely, because Ki-Adi-Mundi says that the Sith have been extinct for OVER a millennium, and 1,000 BBY isn't even a millennium before 32 BBY. The EU also had to justify how Yoda would know of the Rule of Two under the explanation it developed of the alleged extinction of the Sith.

If this is changed at some point, I think this is one of the times where the EU dug itself a hole that could have been avoided like with the idea that all Jedi vanish at death that the pre-prequel EU had.

Knight Joined: 18 Nov 2011 Posts: 442

My take on it is that information relating to the sith became known to the Jedi and Yoda had it in the Jedi Temple archives. Padawans were always thaught about the jedi history and the Sith were a massive part of that. They were thaught about the Sith and were probably told about it.

Its a shaky theory admittedly.
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