The criteria of an intelligence, going onward or backward depends on the group of demons to do its share of the work. When intelligence resonate with demons characteristics, the power of understanding begins to undergo withdrawal symptoms in a state of confusion.
A brain damage in my opinion is persuasiveness which is bend in the line of thinking, so bad that the line has no straight parts. There is enough demons to withhold the sign of spiritual thinking from consideration of its idea and the idea coming from God banishes. One can say that demons corrupt the idea for moving it towards its side. A good idea has one way and one goal, introducing another sign or signal would lead to a suggestive model to be chaotic in the neuropath, revealing nonsense. Cultures have a big role to play, example: the rites of African religion and American Indian tribes which has communication in personal form with demons project enough disputed ideas to make them stupid. The same with koranic education where the Koran is the presenter of education.
Sex demanding demons say: Turn me on and take control over my whole body, the sky is the limit.
The making of the modern mind is a theological journey developed in likeness to Christ. Being advanced is a ranking stands for Jesus.