During the Spring and Autumn Period there was a very capable painter, one day he was invited to paint the portrait of the King of Qi. In the process of painting, the King of Qi asked the painter: "What is the most difficult thing to paint?"
The painter replied, "A person in action is the most difficult to paint."
The King of Qi asked: "What is easiest to draw?"
The painter said, "A ghost is the easiest."
"Because people are familiar with people, even if there is a tiny mistake in the painting, it will be found and pointed out, so it is difficult to draw. As for the ghosts, nobody ever saw one, there is no definite shape, there is no clear appearance, so I can casually paint one. After I finish drawing, no one can prove it is not a ghost, so drawing a ghost is very easy."
The painter's speech proves that if there is no specific objective criterion, it will be easy to "falsify" things. "It is Easier to Paint a Ghost Than a Person" is an example of how spouting empty nonsense is easy, but in order to have a real ability, it takes a lot of effort to obtain.