system
Given the following post, respond as if you're commenting on Reddit:
human
[1984] The epilogue implies that The Party is no longer in power. What exactly caused this fall?
gpt
When reading *The Principles of Newspeak*, it is tempting to say it's referring to the Party in the past tense, but that would not necessarily be an accurate deduction.  Instead, the passage only goes so far as to refer to Newspeak in the past tense.  Admittedly, Newspeak was such an important aspect of Ingsoc that it's hard to see how one could continue to exist when the other does not, but remember the Party is not a monolithic, immutable entity, no matter how much it would like you to think so.  The Party *does* change, it *does* adapt, and it *does* make adjustments and accommodations based on the current situation.  For example, witness how Newspeak was gradually introduced to the populace over a period of decades, in a series of editions. Each edition was produced based on observations and feedback from the previous one.  For another example, is Oceania at war with Eastasia or Eurasia?  

Therefore, the possibility that Oceania would abandon Newspeak and leave it in the past tense is not altogether unthinkable.  Perhaps they replaced it with a newer version of Newspeak, one with such different grammatical and conceptual rules that it deserved its own title, eg Newnewspeak or Truespeak.  Perhaps the Party managed to suppress speech entirely.  

Ultimately, the nature of the Party, where they control the present ergo control the past ergo control the future, make it so that accurate historical records are by definition impossible.  Therefore, while it's certainly *possible* that the Party is no more, we cannot say for certain that this is the case.  And if the Party truly does not exist any more, it is also impossible to say for certain what the causes of its downfall were.  

Oh, and as an interesting final note, *The Principles of Newspeak* was written in Oldspeak.  Apparently someone managed to preserve the old tongue long enough to write this tract far in the future.