Comment by self_awareness

Game theory tells us that we should lie if someone else is lying, for some time. Then we should try trusting again. But we should generally tell the truth at the beginning; we sometimes lose to those who lie all the time, but we can gain more than the eternal liar if we encounter someone who behaves just like us. Assuming our strategy is in the majority, this works.

But this is game theory, a dead and amoral mechanism that is mostly used by the animal kingdom. I'm sure humanity is better than that?

Propaganda is war, and each time we use war measures, we're getting closer to it.