Confidence, Wikipedia Style

Confidence is generally described as a state of being certain, either that a hypothesis or prediction is correct, or that a chosen course of action is the best or most effective. Self-confidence is having confidence in oneself. Arrogance or hubris in this comparison, is having unmerited confidence--believing something or someone is capable or correct when they are not. Overconfidence or presumptuousness is excessive belief, in someone or something, succeeding, without any regard for failure. Scientifically, a situation can only be judged after the aim has been achieved or not. Confidence can be a self-fulfilling prophecy, as those without it may fail or not try because they lack it, and those with it may succeed because they have it, rather than because of an innate ability.