"The ears don't listen, but the mouth speaks" The general public lacks the awareness and ability to distinguish the truth from the false and trace the source. Due to the convenience of dissemination, those views that are taken out of context and do not make sense have inadvertently become the common sense of everyone, hindering social harmony. The poster expresses this phenomenon with the homonyms of the idioms: "full of knowledge" and "smart". The "we" who think they are smart and knowledgeable are inadvertently spreading these absurd views.