John comes home from work after a busy day. Despite this, he still has a lot of 'work' ahead of him to look after his son. It is 6pm in the afternoon and therefore his son has recently returned home, and he can deduce this from the fact that he finds his son's school bag next to the door. His mother accompanied him home immediately after school like every Monday of odd-numbered weeks, respecting custody. "Hey kiddo" John said looking around the house to spot his son