Winston's job at the Ministry of Truth is definitely not the truth.
Winston works in a small area, with newspapers and messages and a
"memory hole." In this memory hole, he gets rid of documents that are
to be completely destroyed forever. In his job, he often got rid of
the truth, so it is ironic that they would call it "The Ministry of
Truth," because it entails the exact opposite. He gets rid of the
truth and instead, replaces it with lies and statistics that are
false. No one really understands what is real because all of the
statistics are lies because Winston recreates them to show false
truths. A quote on page 41 says, "Statistics were just as much a
fantasy in their original version as in their rectified version."
There is also another quote on the same page that says, "Everything
faded away into a shadow-world in which, finally, eve the date of the
year had become uncertain." Basically, no one knows the truth or
anything for that matter. Winston's job is basically one big
oxymoron.