How do humans separate sarcasm from sincerity? Research on the subject is leading to insights about how the mind works.
Many parts of the brain are involved in processing sarcasm, according to recent brain imaging studies. Rankin has found that the temporal lobes and the parahippocampus are involved in picking up the sarcastic tone of voice. While the left hemisphere of the brain seems to be responsible for interpreting literal statements, the right hemisphere and both frontal lobes seem to be involved in figuring out when the literal statement is intended to mean exactly the opposite, according to a study by researchers at the University of Haifa.