It is not perfect, but you can learn to predict people's actions as well. There are a few unpredictable people out there...

[He casts a glance at Lloyd with that statement.]

But for the most part, it will serve you well. For example, say that a well dressed man came into your town with a great deal of luggage. All of his belongings are well secured. He travels alone other than a pair of guard dogs. He seems to be excessively social and smiles at everyone he meets, even people that are rude to him. He doesn't carry many weapons. What sort of guesses would you be able to make about him?