Continuing marking early in the morning/late at night.

It only took me half an hour to mark one Q just one more Q to go now. The problem is dealing with some social facts but in fact if one were studying this area of sociology one would not be so certain that the numbers for this statistical problem would actually be accurate. In fact, these numbers might never actually be available but in our imperfect world these numbers are always available for policy but in true science these numbers would be doubtful and more uncertain than they seem to be presented in this statistics textbook. I will meantion this to the students later today. The problem claims to measure the number of unknown cases but by definition these are still unknown in number and will always remain unknown.