Fools can't communicate with each other.

Fools can't communicate with each other. As the ancients in China said, a willing son can teach, but a rotten wood cannot be carved. This sentence means: the child is stupid and can't draw inferences from others. Reasoning with him is casting pearls before swine. A rotten wood cannot be carved, which means that people have become hopeless. Fools can't communicate. Explain it in ancient Chinese.