Criticize the following in terms of the rules for definition by genus and difference. After identifying the difficulty (or difficulties), state the rule (or rules) that are being violated. If the definition is either too narrow or too broad, explain why.

A genius is one who, with an innate capacity, affects for good or evil the lives of others.

—Jacqueline Du Pre, in Jacqueline Du Pre: Her Life, Her Music, Her Legend (Arcade Publishing, 1999)