A Common Error

The Sultan heard that one of his nieces had taken to walking around with a silver platter on her head.
He summoned her to the palace and watched as she walked with grace and speed.
“Her balance is most excellent,” said an adviser.
A general agreed, “This would help the troops in combat.”
So, the Sultan sent out the order that all soldiers put silver platters on their heads.
However, his people were barely literate, so they mistook his command for putting their heads on silver platters.
His army decapitated, the enemy easily conquered his country.
And took his head.