Julia, alone with Winston in their secret place told him that during the Two Minutes Hate her great difficulty was to avoid bursting out laughing.
She seemed to grasp the use of propaganda, of manipulation even better than he did, yet only questioned the teachings of the Party when they in some way touched upon her own life.
She accepted some of the official mythology, simply because the difference between truth and falsehood did not seem important to her.
She believed, for instance, having learnt it at school, that the Party had invented aeroplanes. Winston, who attended school ten years before, had been taught that was only the helicopter the Party claimed to have invented.
Winston assumed one generation more, and it would be claiming the steam engine.
With history constantly being rewritten, with generations dying, truth would be what the Ministry of Truth said it was.