Moreover, the same child who cannot pay attention in class will typically have a very long attention span and be easy to handle if he is doing something which interests him. Gifted children often display the exact same behavior problems in school as ADD children. Caffeine has been proven to increase alertness for most people, and they retain more information while under its affects. If a few cases of ADD are known to result from brain damage, then this proves that all ADD is caused by damage or a defect of the brain. Of course not.
Environmental effects can and often do mimic genetic traits.
What is interesting about this argument is that mild brain damage has also been found to increase creativity. One theory is that the area of the brain damaged regulates the flow of information within the brain. Because the creative person has less regulation of this information, they receive more of it and are able to combine highly disparate pieces of information into new ideas and inventions. Therefore, ADD is caused by a neurological defect. Another very flippant argument.