User blog comment:Weedle McHairybug/So, why did Big Boss react with confusion in regards to Cipher? (Spoilers)/@comment-1672596-20100825204929

Well, can you clarify what you mean by "I don't understand"? I just wanted to know, since there are many possible meanings for that phrase.

And I'm pretty sure that MGS4 is canon. I only used the arguement that it isn't as a "devils advocate" arguement to counter those who claim that MPO is noncanon (since thanks to Peace Walker at the very least, there are people who think it is non canon). The only way they would ever acknowledge that MPO is non canon is if they engaged a massive recall of MGS4 and MGSagas, then re-released them edited to remove any trace of MPO in them, even going as far as to re-do dialogue to remove even the most remote hint that it was even canon, deleted the entries of MPO in MGS4's Database, among other things, since that's what I would have done if I did feel that MPO was not canon, or at best a forgettable sidestory. Plus, in a way, MGS4's events (more specifically, EVA's recollection of the history of the Patriots) was either ignored, or contradicted outright (such as LET's children being the final straw that caused him to leave the Patriots and wage war against them apparently immediately thereafter.), so they are somewhat even there.