So, some ants in a colony go to war. They want some more troops and know that there are ants that went to wars as well. They call them war-ants.
They start barging into homes to search for more war-ants. They barge into a home, and the lady-ant goes, "Hey, why are you here? Can you please leave?" One of the ants replies with, "I'm sorry, but unless you have a war-ant, we have to keep searching your house."
