Think for just a minute before making that post to a mailing list or asking that question to a friend. Is there a chance you are overlooking something obvious?
It is also good to give yourself sometime to let a conclusion "sit" in your mind before publishing it or posting it. Sometimes our first, "off the cuff" reactions are correct and sometimes they aren't. Haste may cause you to create a brick wall where none existed.
I almost assumed a relative had military service based upon his WW2 era classification record. Turns out that the classification he received meant something different during war time than during peace time and the chart of classifications I was using were peace time classifications. When I looked at the appropriate set of classifications, what I tought was unusual was not.
Sometimes a little reflection answers our questions.