[to1y]

That's the problem. There is no clear definition of autism. It seems you can be slightly socially averse or have any obsession(hobby.)

[seba_dos1]

Being slightly socially averse or having a hobby are not signs of autism either. During the screening, you fill a questionnaire with dozens of questions on various matters and only coexistence of many factors may lead to diagnosis.

(that said, being incredibly annoyed at vagueness of these questions is kinda a hint already)