No, but Palpatine would have to be if his plan was "I'll lay here, with the best lightsaberist in the galaxy holding his saber three inches from my neck, then cross my fingers!"
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There's an age-old tactic called "playing possum". Perhaps you've heard of it. Lie down and pretend to be defensless so the other guy will drop his guard.
Palpatine lied down.
Windu dropped his guard.
KICK WHAM STUNNER~! 3 count. Winner, and still Emperor...Palpatine!