Factual error: As soon as Lois and Peter board the ship it starts moving. This does not happen in reality.
Factual error: If one of a person's parents is an American citizen, that person has citizenship no matter where they are born. Since Thelma was a U.S. citizen, that makes Peter a citizen of the U.S. Also, were there no tax records for Peter since he had been married to Lois?