McKinnon wrote:
First of all, I have to say that this conversation is really fun. Okay, so I really like both the movies and the books, so I was considering both. I'm not really a purist in any sense of the word, but each to his own.
(That's usually "to each his own", BTW.)
The 
Lord of the Rings movies weren't as bad as some novel-to-film adaptations have been (though there are some really grating issues where Tolkien's original would have been plainly better 
especially in light of all the constraints of film), but for checking the plausibility of military matters Jackson (or whoever) doesn't have much credibility in my book, as after looking at a map of Middle Earth the "elves at Helm's Deep" thing looks essentially impossible from a 
logistical perspective.
McKinnon wrote:
And don't muskets look impressive?   Well anyways, I think the Rohirrim wouldn't have minded the guns with all the stirring music.  

  Sorry, movie again.
It's not the 
Riders of Rohan that would mind, it's the horses they're riding. Unless a horse has been trained to ignore explosions (though I suspect the Black Riders' horses wouldn't mind), it'll spook and bolt.
McKinnon wrote:
In all seriousness, i didn't say I thought Sauron had these guns, so the battle at Minas Tirith would not have been affected. Just Saruman.
I talked more about Sauron because I think everything you said as a reason Saruman might have developed them fits Sauron a 
lot better, and in any case Saruman was essentially Sauron's vassal so if Isengard had developed them Mordor would have gotten them in short order.
McKinnon wrote:
I don't think that Saruman imitated sauron so closely that he didn't ever consider doing something that Sauron didn't do. After all, he wasn't really on Saurons side, he wanted the ring for himself.
Yes ... but he developed Isengard into a "mini-Mordor," developed the Uruk-Hai because Sauron had orcs, invented "the White Hand" because Sauron had the Lidless Eye as his symbol, and so on.
McKinnon wrote:
I'm assuming that it was just normal powder too
Most likely ... but we know that wizards can do "magic" with fireworks and such (or that may just be Gandalf, if each of the wizards had a specialty).
McKinnon wrote:
and so it would have been a hassle to bring cannon in the rain.
Nor is Helm's Deep all that accessible. But if I were attacking a place like that, and I had cannon, I'd make sure to bring them along no matter how difficult that turned out to be. Even unreliable cannon can do the work of many battering rams, at a distance and far better. 
McKinnon wrote:
But again, I don't imagine that each and every uruk had a musket or anything like that. He might have just been expirimenting with the possibilities.
This seems somewhat unlikely; from Gandalf's account of their meeting, his experimental interests center on taking things apart, not devising subtle improvements. (Note that this is a theological point on Tolkien's part: in Middle Earth, evil cannot truly create, it can only destroy, twiist, or imitate.)
McKinnon wrote:
Now all this is just my imagination and part of the way I view the story. Nobody else has to see it this way.That's the beauty of books, really. Everyone comes away with a differen picture in their minds.
That's an artifact of the Fall and the confusion of languages at Babel---one which God has used to his great glory, but still .. As I've remarked elsewhere, there are at least three sets of meanings in any literary work: the meaning that the creator intended for it to contain, the meaning that the reader---the "unsung collaborator," as Bujold puts it in an essay of that title---gathers from it, and lastly the meaning that it 
actually contains. The purpose of discussions like this is to bring the second set, for each reader involved in the discussion, as close to the immutable-but-not-yet-directly-knowable third set as possible. 

McKinnon wrote:
Now about the Pre-flood guns. First of all, Noah and his sons were certainly not cutting wood and mining metal right after they got off the ark. For one thing, the trees had to grow back. They were just surviving, so it's reasonable to assume that much knowledge could have been forgotten.
I haven't done the math myself, but I saw a calculation using the relative ages given in the relevant chapters of Genesis that led to the conclusion that (IIRC) Noah was still alive when Abraham left Ur. Most knowledge was lost, but it was due to the presumably limited skill-set of the eight people who were saved, to ordinary forgetfulness, to changed priorities, and then to the confusion of languages at Babel, not just to the destruction of records and the difficulty of immediate transmission of skills.
McKinnon wrote:
As for legends, I don't really know about that. I kind of thought it was things that aren't true that create legends, lol.
Legends often grow up around a kernel of truth. (For example: "King Arthur" was probably a real person, Charlemagne was 
certainly a real person, but most of the legends surrounding their courts are probably fabrications. More to the point, most of the legends about dragons, giants, and so on probably aren't true, but there 
were such things as colossal reptiles and men who grew to be more than nine feet tall.)
McKinnon wrote:
I'm not really sure what you mean by craters in the near east. The flood was so incredibly catastrophic that it certainly would have erased traces of firearms or explosians. We don't even know that the pre-flood world was located in the area now known as the near east.
No, I mean evidence of the use of explosives in the period between the flood and Babel---gunpowder is apparently not all that difficult to make if you know how, and we don't know what was carried onto the ark (other than the eight people, at least two of every kind of animal, and enough food for everyone), so if gunpowder or other explosives were known before the Flood it wouldn't be unreasonable for them to be used for "engineering" purposes soon afterward. (Though, like you said, resources would be quite tight for a while, so I think it'd be unlikely.) And that would leave definite marks on the landscape. (The protagonist of H. Beam Piper's 
Lord Kalvan of Otherwhen deduces that the alternate-Pennsylvania he's been dragged into isn't the past from his knowledge of history, but deduces that it's not a post-apocalyptic future from the absence of gaps blasted through the mountains for the Interstate highways.) I specified "the Near East" because that's where the ark landed.