skyjedi2005 said:

I always wondered if the four lights torture scene in TNG was a reference to 1984 by Orwell. Where they try to convince 2+2=5 instead of 4.

Which probably was an Orwell reference to what Stalinism ?

Yeah, that scene is a very clear reference to a moment in 1984. For anyone who hasn't read it: The main protagonist (Winston) has been caught and is being tortured in order to force him to conform to be an appropriate member of society. His torturer, O'Brien tells him they found his diary and that he wrote in it "Freedom is the freedom to say two plus two makes four. If that is granted, all else follows." So O'Brien holds up four fingers and asks him how many fingers he is holding up. Winston tell him four. Then O'Brien asks him, what if the party wants 2+2=5, then what? And asks Winston to again tell him how many fingers he is holding up, inflicting pain on him every time he answers truthfully with "four".