In the course of his reading, George Orwell probably encountered certain storytelling conventions over and over again, and these are the devices he would have most likely used in his work
That is why it does not follow that, even though his 1984 resembles other books of its futuristic genre, Orwell read those books; it is possible that he and the other authors were simply drawing on the same body of literary conventions
A recent film that involves car chases, explosions, and clever villains is not necessarily directly influenced by other films of the action genre.