Considering that Andy Kaufman died in 1984, years before this girl was born, being fooled by her speaks volumes about his math skills.
Erm if he wasn't actually dead (like she claimed) then she could have been his daughter.
Do you not understand the story?
They can't be that intimate of details - Kaufman died in 1984, Alexandra Tatarsky was born in 1989 so someone had to be telling her details or they were more public than Michael thought.
Amateurs.