Being "obsessed" with Aristotle or any other historical figure or subject matter does not necessarily indicate autism or any other neurodevelopmental condition. People can develop deep interests or passions in various topics for various reasons, and such interests are not exclusive to individuals with autism.
Autism, or Autism Spectrum Disorder (ASD), is a complex neurodevelopmental condition characterized by differences in social communication and behavior patterns. It is important not to make assumptions about someone's neurodiversity based solely on their interests or hobbies.
If you or someone you know is concerned about autism or any other developmental issue, it is best to seek advice from a medical or mental health professional. They can conduct a comprehensive assessment to provide a proper diagnosis and any necessary support or intervention.