Is Every Human Being a Person?

Not every person is a human being, but is every human being a person?

Examples abound of non-human persons: Christians believe that the Godhead consists of “three Persons of one substance”; U.S. Supreme Court justices have ruled that corporations are “artificial persons”; fans of Star Trek argue that androids like Data and aliens like Spock are all (fictional) persons; and the Spanish Parliament even ruled that great apes are “legal persons.”