Convenient Autistic Cousin

Convenient Autistic Cousin is a (Theoretical) relative, usually between 4-7 year old who is autistic once you tell someone that you are Autistic.

Allistic people attempt to use this theoretical relative as a way of saying "You don't look Autistic (Because there is a stigma about relation between Autistic folk and mental disability)" to either invalidate you or as an incredibly bad attempt to relate to you in some way.

Somehow said Cousin is always male and younger than teenage years. Sometimes might be preceded (or followed by) phrase "You don't look Autistic!". Nobody ever actually has seen the cousin in question, Our Scientists believe said person to be in quantum state where they appear in Allistic mind only when they are faced with reality that the person they talk to is Autistic; and seems to disappear the moment he (Convenient Autistic Cousin) is no longer needed.

"Oh I'm Autistic by the way"
"Oh, you Don't Look Autistic, I have a Convenient Autistic Cousin who is 5 and he doesn't behave like you"
"BRUH"