Can A Lightsaber Cut Through Superman?

Hmmm... This uses the same premise for lightsaber construction I divined when I was a kid (middle or high school) and which I still think is the most sensible, so I am inclined to agree...

However, I believe the canon explanation of the lightsaber is very different, and to some degree quasimystical (see p98-99 of Jedi vs. Sith: The Essential Guide to the Force) to differentiate a lightsaber from the basic technology used in mundane blaster weaponry. Page 94 of the afforementioned book claims that "Lightsaber technology operates on the complex principle of tightly-controlled arc-wave energy," and explicitly states that the blade has NO mass, precluding the possibility of plasma.

In short, the science behind the Lightsaber is complete fantasy, just like the science behind the telekinetic powers a Kryptonian unconsciously wields (which, as an aside, a force user might be able to turn off). So, the question is, whose nonsense trumps whose nonsense? And the answer would largely depend on who the writer wanted to win.

Personally, without considering use of the Force, I would STILL bet on Superman. First, he should certainly be able to dodge any jedi not using some sort of precognitive powers, but more practically, consider how much effort Qui-Gon had to exert to poke a hole in that door in Ep I... Doesn't it seem likely that Superman is at least an order of magnitude more resilient than that door? Furthermore, lightsabers can't cut through beskar (i.e mandametal; the Star Wars equivalent to adamantium), and I would presume that Superman is more resilient than any forged metal.

Epic win!

Epic Answer!

and i'll tell you what a vagina feels like

This is absolutely amazing.

yeah, but using kryptonite as the focusing crystal in the lightsaber would be like cutting through butter since the blade takes on the properties of the crystal.

Win

That was a lot better than the answer I offered up, which was "possibly".