This matter is easily settled: the One Ring can only be destroyed by the fires of Mount Doom, where it was created. That is what everyone knows if he has read or even only watched The Fellowship of the Ring.
There are no lightsabers in the Lord of the Rings universe; so that logic doesn't work. That is what we would call a "limitless fallacy".
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"The Daemon lied with every breath. It could not help itself but to deceive and dismay, to riddle and ruin. The more we conversed, the closer I drew to one singularly ineluctable fact: I would gain no wisdom here."
Lol before this degenerates into a 'no-limits' vs 'limits' (although the latter fallacy is something I've only seen argued/used seriously by a single poster *cough*) fallacy argument I'd just restate an earlier argument of mine that while there's no real way we can say for certain that the ring would or wouldn't be vulnerable to a lightsaber I can say that from where I'm standing given that the One Ring was said to have only one weakness and lightsabers have been shown to be frustrated in the movies and outright defeated in the EU by several materials I'm more inclined to lean toward the Ring's camp.
This is an argument that is very open to criticism and deconstruction, but then I'm not trying to pass it off as a perfect proposition but rather a feeling.
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“Where the longleaf pines are whispering
to him who loved them so.
Where the faint murmurs now dwindling
echo o’er tide and shore."
-A Grave Epitaph in Santa Rosa County, Florida; I wish I could remember the man's name.
In fact, the book also mentions that a mighty dragon's fire (such as Ancalagon's) might destroy the Ring (being "closely related" to Mount Doom's fire).
A lightsaber, on the other hand, is essentially a normal handweapon (albeit a rare and powerful one), and definitely not empowered with the hellfire required to destroy the Ring (if it can be destroyed at all: I would rather say it can only be undone, not broken).
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For that argument to work you would need proof that it's the magical aspect of the dragon's fire that would destroy the ring, and not simply the heat.
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"The Daemon lied with every breath. It could not help itself but to deceive and dismay, to riddle and ruin. The more we conversed, the closer I drew to one singularly ineluctable fact: I would gain no wisdom here."
You're right, I just re-read the passage; it says "It has been said that dragon-fire could melt and consume the rings of Power, but there is not now any dragon left on earth in which the old fire is hot enough; nor was there ever any dragon, not even Ancalagon the Black, who could have harmed the One Ring, the Ruling Ring, for that was made by Sauron himself."
I only had the first part in my memory, not the second.
The passage, however, also clarifies that "simply the heat" does not suffice (since it suggests that dragon's fire is hot enough to burn rings of Power - which seems to be true, thinking of the Dwarves' rings' destinies -, but does not suffice to break Sauron's power in the One Ring).
__________________ Life is complex: it has both real and imaginary components.
This is where I was going with it. There's no amount of heat that can destroy it.
But I wonder...is there a limit at which it can resist? Meaning...something that is millions of degrees? Or is that a limits fallacy: meaning I am applying an arbitrary limit to the durability of the one ring.
The One Ring is a magical artefact. Its spell was forged in Mount Doom, so that is where its spell can be undone. In Middle Earth, it can only be destroyed in Mount Doom.
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There is nothing in Middle Earth other than Mount Doom that can destroy the ring. They even said that Ancalagon's fire wouldn't damage it and he's the most powerful dragon of them all.
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I am creator of all the master of all things BS. Bow before my mighty form!
Do you mean the inscription in Elvish letters? It says "Ash nazg durbatulûk, ash nazg gimbatul, ash nazg thrakatulûk agh burzum-ishi krimpatul", meaning "One Ring to rule them all, One Ring to find them, One Ring to bring them all and in the darkness bind them".
__________________ Life is complex: it has both real and imaginary components.