Autistic people are as likely to experience auditory halucinations as neurotypical people. Auditory halucinations are not a characteristic of autism, if an autistic person is experiencing these symptoms it is a sign of a mental health problem and not due to their being autistic.
He was an autistic savant
Define what you mean by 'act normal', or for that matter how you define normal.Many Autistic people attempt to 'pass' as neurotypical as a means of survival, but as Autism acceptance increases there's less of a need to do this - there's nothing wrong with being Autistic, continuing to act Autistic is not a problem and shouldn't be treat as something abnormal.
The biggest problem that exists in America today about Autism is ignorance. A lot of people don't understand Autism or respect Autistic people, there is a lot of prejudice that results in Autistic people being bullied, murdered, abused, tortured, and denied their rights.
Autism Spectrum Disorder is a neurological condition, autistic people are born autistic - we do not know why people are autistic.
A person is born autistic - they do not become autistic.
He's not autistic
An Autistic is a person with Autism.
Yes, he is indisputably autistic.
You must be referring to an autistic savant. Basically, its an autistic person who has savant syndrome.
A person doesn't 'end up' autistic, a person is born autistic. Not all autistic people are non-verbal either.
A person doesn't become autistic and being quiet doesn't make someone autistic - a person is born autistic.