I am saying when you walk up to a person, know nothing about them, what actions do or do not make them normal in general...not in a very very specific parameter

I am saying when you walk up to a person, know nothing about them, what actions do or do not make them normal in general...not in a very very specific parameter? If that person says "I don't really talk to my family"...does that make them an abnormal person in the most general sense?