What is the symbolic significance of 2+2=5?I am trying to prepare an essay about this, but my thoughts aren't coming together. The entire topic is:...

To me, the only meaning of this is that it symbolizes just
how completely the Party has changed people.  We know that the Party is trying hard to
be the only source of reality.  It tells people things like "War is Peace" and expects
them to believe it.  It changes the past (like what Winston does) so that people cannot
have any idea of what happened other than what the Party
says.

To me, the equation you mention is sort of the
ultimate example of the Party controlling people.  It is asking people to believe when
it changes a basic law of mathematics.  So if it can change that, it can change
anything.

So 2+2=5 is, to me, a symbol of how the Party has
almost total control over what people think.