This riddle presents a scenario where a father is covered with a blanket and his son is asked to admit that he does not know who is beneath the covering.
This occured to me when pondering the paradox (and this may going off in a completely different direction and not the intended use of this paradox) but it could be of use when someone insists that the know everything (a common idea in immature young people is that they think that they are so smart that they know everything), and it can show that there are some things which we can know and some which we can't know (the mature adult easily understands this) and the point being that there are many things which we can't know (the future, other peoples thoughts or motives, and even the results of our actions)