One is likely to feel comfortable approaching a stranger if the stranger is of one' s approximate age. Ttherefore, long-term friends are probably of the same approximate age as each other since most long-term friendships begin because someone felt comfortable approaching a stranger. The reasoning in the argument is flawed in that it ['presumes, without warrant, that one is likely to feel uncomfortable approaching a person only if that person is a stranger', 'infers that a characteristic is present in a situation from the fact that that characteristic is present in most similar situations', "overlooks the possibility that one is less likely to feel comfortable approaching someone who is one's approximate age if that person is a stranger than if that person is not a stranger", "fails to address whether one is likely to feel comfortable approaching a stranger who is not one's approximate age"]