Tag cause and effect

Have I killed someone?

Causality. It is a funny thing. Or not so funny.

A few years back, I took my class, as a teacher, on a class trip to the Historic Dockyard in the naval city of Portsmouth, UK. My school is some 45 minutes walk and a short ferry ride from there. With the cost of coaches, it is important to be able to walk to such places to keep the costs down for parents.