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I knew all of this previously, actually. Everything I said was true. Dwarf Fortress evolved from Mutant Miner, which itself didn't have anything to do with Moria. The "digging too deep and too greedily" can apply to anything, and isn't necessarily from Tolkien's works. Even if it was, it isn't quite enough to allow you to say that Mutant Miner was based on Moria. Saying that it was is like saying, "This has legs, and
this has legs. Therefore, all tables were originally based on cats, as cats came first." Granted, Mutant Miner bears more similarities to Moria than cats do to tables, but it's along the same line of reasoning. It didn't draw
much inspiration from Tolkien's works until it began to evolve into what it is today, drawing heavily on Toady's (then) recent project, Slaves to Armok.
You are right, of course. Mutant Miner and Dwarf Fortress are not the same game. Then again, no supporter of the Theory of Evolution in their right mind would try to tell you that we are all single-celled organisms. Dwarf Fortress would not exist if it wasn't for Mutant Miner. They bear the same basic ideas - mining with a number of people. Perhaps the original code is elsewhere, and Dwarf Fortress was created from scratch, but that doesn't mean it wasn't originally something else.
Basically, Dwarf Fortress was not originally inspired by Tolkien, as I said. It was inspired by Mutant Miner. It may be influenced (and heavily!) by Tolkien's works - particularly Moria and certain parts of the Silmarillion - but that's different.
I won't deny The Hobbit being a 76-year old children's novel, though. Doesn't mean it isn't a good read.