An example of a wrong conscience would be a man who had sex with a woman he thought was his wife, but was actually his wife's twin. He made an error in judgment by sleeping with the wrong woman. Much of faulty consciousness is ignorance, not knowing that the action performed was wrong. There are two types of ignorance that Aquinas uses to describe certain situations and they are invincible ignorance and vincible ignorance. Invincible ignorance is ignorance that is exempted from moral responsibility due to certain circumstances. Usually, invincible ignorance is used in cases where a person has harmed someone else, however, he is suffering from some kind of mental disorder. Aquinas would say that this case of faulty conscience would be excusable because the person was not aware that what he was doing was wrong. Conquerable ignorance, however, is when a person is aware that what they are doing is wrong and is given moral responsibility. Aquinas would say that this case of erroneous conscience is not excusable because the person is aware of what is