When an ordinary person spoke with one of them, they would always be thinking, He’s a Wallfacer, his words can’t be trusted, and those suggestions would present a barrier to communication. But when two Wallfacers spoke with each other, the suggestions that existed in both minds cross-multiplied those communication barriers. Such an exchange, in fact, rendered anything either side said meaningless, so that communication itself lost all significance. This was why there had been no private interaction between Wallfacers.
