The listeners state of mind is important to this as well. The third link below is about Harry Frankfurt’s famous definition of bullshit, something which has become prescient in how well he predicted the age of bullshit.At this point, the question of how we can know the truth arises. This lesson does not aim to answer this question, but to investigate three positions on this: correspondence theory, coherence theory and pragmatism. The students should use the first link to understand the differences between the theories and try to understand the strangths and weaknesses of each theory.