Some pronouns illogically stand for a noun
that is implicit, not stated.
Japan's exports of cars skyrocketed in
the 1970s. The main reason is their skill in production.
CHANGE TO
Japan's exports of cars skyrocketed in
the 1970s. The main reason is the skill of the Japanese in production.
Other pronouns illogically stand for nouns of a different
number: that is, a singular pronoun stands for a plural noun, a plural
pronoun for a singular noun.
Everyone has a right to the information
they need to...
CHANGE TO
Everyone has a right to the information
he or she needs to...