Let us examine the data. Let us try to infer with greater precision what is the nature of
the difference between the first data set where point set 1 and point set 2 are independent
and are each uniformly distributed over the unit square and the second data set where one
point set seems to be closer to the other. It seems that it is not just that one point pair are
closer to each other, but there are a few point pairs which seems to be closer to each other.

Each point from point set 1 has a closest point in point set 2. Each point from point set 2
has a closest point in point set 1. As there are 10 points in each point set, there are 20 such
closest point pairs, not all of them necessarily unique. There might be duplicates.