Most animals can perform physical tasks that the naked human can't. But humans plus our technology can outperform most animals. With planes we can fly, for example, and even fly to the moon. With clothes we have fur, and with knives we have fangs.
Indeed, some humans are much smarter than others. That's why I pinned posthuman intelligence to the average human adult way of thinking. And the principles I lay out here suggest that a posthuman mentality worth reflecting on would make the knowledge taken for granted by the average human adult seem childish. It's just a continuation of the series of the average child to the average human adult to the average posthuman.