Once, the Jedi knew that the Supreme Chancellor of the Republic who had absolute control over a clone army was an evil Sith Lord... Why didn't they take cautionary measures to save themselves from the very great threat the Sith and the Clone Army presented to them? The Jedi knew that that Palpatine (being a Sith) could and would go after them at any moment and would most likely use the clones to do this. So why didn't the Jedi (a) evacuate the Temple (b) warn the Jedi Generals (c) anything other than what they did (such as call all Jedi back, lockdown the temple, and form a defense strategy)? Is it not pretty much standard procedure to lockdown/evacuate/ensure the safety of any parties when there's a direct threat to them from any source. Seems pretty basic.