sentences:  If an antecedent is a thing, either specific or generic (such as a snowman), rather than a person, the appropriate pronoun to refer back to it is "it", and no difficulty arises.Likewise, if the antecedent is more than one thing, again either specific or generic, the pronoun "they" is used to refer back to them, and again no difficulty arises.When the antecedent is a specific person (whose gender is therefore known), the correct referring pronoun is either "he" or "she", depending on the person's gender.