system
Given the following post, respond as if you're commenting on Reddit:
human
How do we know that the autism spectrum is at least in some part, variation in personality?

I don't mean in extreme cases, I'm talking about people who have no distinct appearance or affect, but have niche interests, like logic puzzles and are socially awkward/have an anxiety disorder? I'm wondering how those groups are differentiated. How are people with mild ASD separated from anxious people with niche interests?
gpt
Socially awkward doesn’t necessarily mean they have an anxiety disorder, just that they are socially inept, ie. they have struggles with reading social cues much like a dyslexic struggles with reading words on a screen. Social anxiety disorders are characterized by extreme self-doubt and extreme fear of social situations, autism is more a lack of interest in social situations.