Answer:
Orwell uses the rhetorical resource "unify 2 + 2" in the book "1984" to express the ease of the great powers in manipulating true concepts about some factor that forms society.
It makes this rhetorical feature work by showing logical and easily identifiable forms in the real world, of how government amnipulation can occur.
Step-by-step explanation:
"Unifying 2 + 2" refers to the fact of bringing the truth back to society through reasoning and critical thinking. This refers to the ease of government powers in manipulating and modifying the truth of historical facts and concepts that shape society. Orwell uses this feature in a logical way showing easily identifiable situations in the real world that prove the need to unify 2 + 2.