FIFA has always insisted that the Hercules Cup won by the world cup champion team is a solid pure gold cup. After precise measurement and calculation, a professor believes that the world cup champion cup - the solid Hercules cup can not be made of pure gold, otherwise players can't hold it over their heads and wave it at will.
similar to the professor's meaning?
If a player can lift the Hercules cup over his head and wave it freely, it is likely to be a hollow pure gold cup