What does it mean for the deaf to hear the dumb say that the blind see ghosts?

What does it mean for the deaf to hear the dumb say that the blind have seen a ghost? The deaf can't hear, the dumb can't talk, the blind can't see, and there are no ghosts in the world. It is impossible to describe the content of "the deaf hear the dumb say that the blind see ghosts" This sentence is intended to satirize those things that are contrary to the facts, full of contradictions, nonsense and fabricated.

The deaf hear the dumb say that the blind see ghosts-this sentence is used to describe Weibo's impetuousness in spreading ecology, which is very vivid. How can deaf people hear? How do dumb people talk? How can a blind man tell? This impossible communication chain often happens in reality. Because, when people are attracted by the striking anecdote of "someone has seen a ghost", they will be addicted to the wonder of the anecdote and the pleasure of consumption, and forget to verify the source of the news and examine the communication chain. Naturally, it doesn't matter whether this "ghost" was first seen by the blind, passed on to the dumb and then told the deaf. This is how the "ghost" of fake news is produced.