Lighter,

> "Murderers deserve their death penalty even if they are innocent."

But consider: Does any sane person believe that? And if not, why complain about it in a song?

It is my own satirical formulation, designed to be obviously and bluntly self-contradictory. The truth behind it is that everybody knows about mistakes (and, worse, about intrinsic injustices), but many people manage to block out this knowledge actively when it comes to matters they deem vital for the foundations of the system. Your characterization of "doublethink" illustrates it well. (The connection to "dialectics" is that this word was officially used by self-declared Marxists as a euphemism for that effect; Orwell had been one of them in the Spanish Civil War and knew the mechanism from inside.)