Behaviour can be confused with intelligence, especially when people have preconceptions about what an intelligent person looks like and how they behave. This reinforces the "intelligent" person's belief that he is intelligent. A person's ability in one aspect of intelligence (e.g. memory, language, mathematics, or IQ score) can also be confused with his overall intelligence and ability to coordinate the different aspects of his intelligence to adapt to his environment (e.g. earn a living, build friendships, enjoy life and become a valuable member of the larger community). A person who is intelligent can lose his intelligence if he believes that everything he thinks about is "intelligent" and "correct", and fails to recognize otherwise. In this case, as a result of not discerning between what is intelligent and what is not, his intelligence can go astray, unchallenged and unnoticed, to the point that it is lost and what remains is arrogance.