A quick read of Wookiepedia to jog my memory reveals something very important about cortosis: it is inconsistent as hell between portrayals. Sometimes its just a very heat and energy resistant material that is also effective against blaster fire, sometimes it actually shorts out lightsabers (and for how long is also very inconsistent). Sometimes its dense and hard enough to be used in the construction of starships (consistent with cortosis as a highly resistant material in general), other times it is brittle and malleable like precious metals. So I'm inclined to consider cortosis one of those EU ideas. You know the kind.mr friendly guy wrote:How do they explain the fact that lightsabers are nullified by cortosis using this 2d spinning singularity business? I would be kind of interested in this as it sounds fascinating.Formless wrote: Another one that I like is the theory that the advanced lightsabers seen in the films actually have a 2d spinning singularity as the blade with the light coming off being some kind of hawking radiation. This gives them the gyroscope factor, and would likewise give the blade enough mass to warrant two handed styles.
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However, if I had to account for cortosis, I would lean towards the "very heat/energy resistant material" interpretation. For starters, it makes intuitive sense-- to my ears "shorting out" an energy weapon is like inverting the polarity of a bullet. Its a technobabble bypass, and the only reason EU writers can get away with it is that Lightsabers are also technobabble that none of their readers actually understand. Heat and energy resistant is exactly the qualities I associate with good armor for a weapon that deals its damage through heat transfer.
Second, as I said there are many ways you could make a lightsaber-like weapon using the technology available to the Jedi that would not be easy to distinguish at first glance from other such weapons. For instance, a lightsaber could potentially be built using forcefield technology. No one would be able to tell the difference... unless they tried using a some silly cortosis bullshit and got cut in half for expecting that to work.
Thirdly, we know lightsabers can be stopped by more conventional armor without being turned off. In the climactic duel of Empire, Luke manages to hit Vader's shoulder plate with a massive baseball swing. Instead of lopping Vader's arm off at the shoulder, the blade bites into it just enough to burn the skin underneath and Vader goes right back to kicking Luke's ass. Also, in the films lightsabers don't cut through all materials like they were butter-- blast doors installed on the Trade Federation's command ship managed to slow Qui Gon an Obi Wan long enough for reinforcements to arrive because it took too much time for a lightsaber to melt through.