Several factors – most of them mentioned in this list – cause psychopaths to be unpredictable. Pathological lying, for example, is one of these factors. Because they rarely tell the truth, it is difficult to determine what psychopaths will do next. Psychopaths’ lack of empathy also contributes to their level of unpredictability. Because they are unable to understand others, they develop shallow emotions, which causes them to get bored easily. This means that they are always on new and different quests, not knowing what they are going to do or where they will end up.