*nod* Not only that, Londo, but also this exchange in Room 101:
Winston:Does the Brotherhood exist?
O'Brien:That, Winston, you will never know. If we choose to set you free when we have finished with you, and if you live to be ninety years old, still you will never learn whether the answer to that question is Yes or No. As long as you live it will be an unsolved riddle in your mind.
This speaks directly to your point that apostates are an invention. A scholarly point can be made that Emmanuel Goldstein in 1984 is also an invention, a spectre created solely to unify the people of Oceania by fear - something all too easy to do when all sources of information are controlled.
I would like to see you expand this parallel in a follow-up piece. This was an excellent, excellent blog entry.