A man walks up to his dresser and puts his money in his pocket. He picks up his cigarettes, his lighter, and puts them in his pocket as well. Checking the mirror one last time, he steps out the door and starts his walk down the street. It's his day off, and he thought he might go down to the park and see if there isn't a pickup volleyball game or something. The weather is nice on this Wednesday afternoon. Less than 100 paces from his house, he is approached by another man, "Excuse me, could you tell about the keys in your pocket?"
"What keys?"
"It's Wednesday morning, so you must be off to work, and statistics show that everyone in this city owns a car, so you must be headed to work, therefore driving, and so you have keys in your pocket."
"It's my day off today."
"Nobody has a day off on a Wednesday."
"I do. Also, no keys in my pocket, but yes I own a car."
"Turn out your pockets then. Prove it."
"I can't. They're sewn in."
"You just don't want me to see the keys. Why?"
"There are no keys."
"Yes there are. Even the news shows that everyone has keys in their pocket."
"What?"
"Look, I know you have keys in your pocket. I don't know why you won't show me, but I'll tell everyone you are just hiding your keys."
"Um... ok"
With that, the two men walked on. One is presuming himself intelligent. The other is just going back about his day, wondering why people assume they know better than him what's in his own pockets.
Sounds stupid?
It's sounds just as silly when people walk up to a soldier and start telling him about the war.