Indeed quite confusing The hat note says that the article is about classic autism i d est the more severe form as you have mentioned however the article often speaks as if the topic is autism in general i d est the whole autistic spectrum I m guessing people have been confused by the article title being simply Autism thinking what is meant is the whole spectrum Hat notes like many ads on websites are frequently not read unless some abnormality in the article against their expectations prompts them to read them Many people with AS or HFA will say they have autism but they do not mean the more severe classic autism Perhaps instead of redirecting Classic autism to this article named Autism we should instead have classic autism under the title of Classic autism and redirect Autism to Autism spectrum It may become more confusing since there is much talk that DSM 5 will reclassify Asperger Syndrome as just autism