What does it mean to argue with two children?

Confucius traveled to the East and saw two children arguing on the way. Ask them what they are arguing about.

A child said, "I think the sun is close to people when it first comes out, and far away from people at noon." Another child thinks that the sun is far away from people when it first comes out and close to people at noon.

The previous child said, "When the sun first came out, it was as big as the roof of a car. At noon, it was as small as the mouth of a plate and bowl. Isn't this just looking small from a distance and looking big from a distance? "

Another child said, "It's cool as soon as the sun comes out, and it's hot when you put your hand into hot water at noon. It's not hot when it's near, and it's not cold when it's far away? "

Hearing this, Confucius could not judge who was right and wrong. The two children smiled and said, "Who said you were so smart?"