Anyway, I suppose it is just as well since there is still a misunderstanding. There IS no "Immaculate Conception" concept outside of the Catholic Church. No one else uses it for any other purpose, not even other Christians. The name sounds fancy and people know it has something to do with Jesus, but it's actually a rather esoteric notion about Mary. It's not a colloquialism but a malapropism that non-Catholics make. I don't understand why you would want to undermine your otherwise extremely impressive scholarship. When a fancy word is used incorrectly it undermines the credibility of the author. There's an irony in that the whole purpose of the book is to dispel the myths and half truths that George Lucas has spewed over the years causing misunderstandings about the nature of his sub-creation while still perpetuating a misunderstanding about Immaculate Conception. You are now aware that this word has a very specific and exclusive meaning so there is no reason to use it incorrectly regardless of the general perception.
I really didn't mean it to become a big thing. It's just a personal pet peeve and I correct it when I see it.