How did the rumor come from? How to judge whether a news is a rumor?

The communicator doesn't care, or he likes to summarize in his own language, while the listener hears another meaning. When I was in junior high school, I once told my deskmate about the Mona Lisa portrait. My original words are, I don't think the Mona Lisa is beautiful, but that person doesn't know what to say. Later, another classmate of mine told me that someone came out and said that I was narcissistic and thought I was more beautiful than the Mona Lisa. I am speechless, such a simple sentence can be misunderstood like this. So, I don't particularly believe what others say now. The best way is to wait for time to prove everything, or ask the parties directly. Before that, I won't follow the trend, and I won't pass on anything.