What is the irony of being blind, deaf and dumb?

People who are contrary to the facts. It is a joke for the deaf to hear the dumb say that the blind see ghosts. Ironically, it is nonsense and fabrication that are contrary to the facts, full of contradictions and impossible to realize. Another version of this joke is that a young old man killed a dead living person with a brand-new broken knife without a handle. The blind saw it and the deaf heard it. The mute shouted and the kidnapper caught up.