The American legal definition of insane is completely insane. It says you are legally insane if you cannot tell the difference between 'right and wrong' (again, with the morality bullshit). This definition seems to have been spawned from an unholy alliance of psychiatry and religion. As evolution functions through pain and pleasure, right and wrong in a moralist sense does not exist. If by right and wrong, you mean correct and incorrect, how can insane be synonymous with ignorant?

Most people, when they think of evolution, they only think about the monkey-to-man relationship. When you understand the full dynamics of evolution, it disproves a hell of a lot more than creationism.