To determine what place on Earth you only need to know the latitude?

As you know, the surface of our planet is divided in longitude and latitude. Longitude is determined by imaginary lines (meridians) that stretch from one pole to the other, and latitude begins to count from the equator. And, since all meridians are connected at geographic poles, these points of the planet do not have longitude, they have only latitude. And 90 ° North is the coordinate of the North Pole, and the same degree South indicates the position of the South Pole.