system
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human
[Star Wars] How come Jedi seem to be able to just start duel wielding lightsabers with ease?

Anakin in episode II and Kit Fisto in the Clone Wars series both at one point suddenly start using two lightsabers with ease and efficiency, but how? That's an entirely different style of fighting that would take years to master like any other, are all Jedi Aldo given extensive training in duel wielding?
gpt
They aren't really given any training unless it's specifically sought out. Using two lightsabers is considered highly aggressive.

When you see one Jedi take up a new lightsaber and start using it, they're usually just surrendering themselves to the Force and hoping that it, combined with the element of surprise, will guide them to victory. It doesn't often end well, of course. See for reference the first battle between Count Dooku and Anakin Skywalker: Skywalker borrows Obi-Wan's lightsaber and it's destroyed within seconds. Using a single saber, he's able to last for a bit longer before being totally disarmed. The Jedi Traitor, Barriss Offee, showed a surprising amount of skill, but given her deep connection to the Force, it can just as easily be seen as the Force guiding her well. In the same fight, Anakin Skywalker could barely match her when using two lightsabers, but once he reverted back to his usual single-bladed style, he proved to be an overwhelming opponent for her due to his superior strength, skill, and her lack of practice with the style.

Most of the other canon examples of people wielding two lightsabers, such as Ahsoka Tano, Asajj Ventress, General Krell, and Darth Maul, came about because they had specifically practiced in that style.