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I like how Vegtamchik writes; he's the only one who provides reasonable arguments. On the other hand, his posts are not very related to the initial dispute about knights and elves.
In any case, since you are comparing fictional elves (and not English archers), the knights should also be from a fantasy world, where, in addition to getting up after falling, they can run and jump in heavy armor. By the way, I think even the most devoted fan of knights could end up hating them and loving elves after reading Lord_de_Set's posts.