Consider the following story line: The mother of a couple of curious children announces to her kids that she has to run an errand and is leaving the house for a bit. Before leaving she places a box of matches on the coffee table in the living room, points to matches, and says, “You can play with your toys but do not play with the matches. If you light the matches you could start a fire and burn the house down.”
Right after she leaves, Lucy, a neighbor friend, stops over, spies the matches, and says, “Hey, wow, matches. Let’s start a fire.”
