Begin from the first tool, the explicit premise 'I matter equally,' which is non-negotiable and needs no justification by achievement or likability. The second tool is to ask of any instruction toward the child: would you say the same thing if she were a boy? If the answer is no, the rule is rooted in gender rather than reason and should be discarded.
Supposedly natural differences between the sexes are largely socialized: we tell girls to be likable, quiet and self-sacrificing while telling boys to be strong and dominant, then mistake the result for nature. Because these traits are learned, they can be unlearned and should not be used to limit what a child is encouraged to become.
Raising a girl to prioritize being liked teaches her to anticipate others' approval and shrink herself to secure it, which trains dishonesty and self-suppression. Instead she should be raised to be full, honest and capable of expressing displeasure, caring about being a good person rather than a pleasing one.
Everyday phrases encode and transmit gender hierarchy: praising a man for 'helping' with housework implies the work is really a woman's, and calling marriage an 'achievement' for women but not men assigns them unequal stakes. Watching the words reveals the assumptions people do not realize they hold.
Adichie notes that the ability to cook is treated as intrinsic to womanhood and as a route to a man's love, and recalls how women are congratulated on marriage as a prize while men are not, with a female relative's worth measured by her husband. She uses these concrete cultural scripts to argue that domestic skill and marital status should never define a woman's value.