Grand Teacher

Math Problem:
If a young man leaves his home at 7:55 AM travelling with his five year old daughter at an average rate of five miles an hour on a one percent grade, and both of them have had breakfast and a full night's sleep, and the father is a former student of mine, does that make me old?
Extra credit: Does this question make me judgmental?
The young man who came up and introduced himself in that now very familiar way, "Hey Mister Caven, remember me?" Which is always a tough place for me to be, since the person asking that question already has me at a disadvantage because they remember my name and my size, shape and hairline has remained somewhat consistent over the years that I have been Mister Caven. These youngsters who show up with their facial hair and heights above three feet do not tend to look anything like their pre-adolescent selves. After a moment, I can see through the way-back filter the shorter, softer version of the person quizzing me about someone they were once upon a time.
In this example, the young man introduced himself as one of my former fourth grade students, which gave me more of a window, and more clues to our math problem. It has been about twelve years since I taught fourth grade, having returned to the computer lab in 2007. That would make our mystery guest twelve years older than when I was teaching him as a ten year old. That would make him approximately twenty-two. If he has a five year old daughter, which we can assume since she is starting kindergarten, then he became a father when he was seventeen.
Or so.
Which is that moment that my mind begins to stray from the mathematics and I find myself wondering how this came to pass. Just because I waited until I was thirty-five to become a father doesn't mean that is the absolute correct answer. Parents are a club of people who care for children. A father who takes his daughter to her first day in kindergarten with a full stomach and a smile on her face sounds like he fits that bill. Just because he found himself doing that job before he finished high school does not necessarily make him less qualified than someone who waited until he was middle aged. Like me.
And since I was this kid's teacher, that makes me partially responsible. And now I will see what I can do with my grand-student.