When I was in school, I beat up a girl. When the headteacher asked me to explain myself I tried to go into detail and explain everything. Crying, I mentioned she had lied to me, sobbed loudly and he assumed that was the ONLY reason. I was punished. Sometimes I still wish I had been wise enough to give a summary: that she had spread such horrid lies about me she was easily able to gather a gang of pupils of all ages who hated me. She got them to chase me around the field that day, shouting abuse, and pelting me with stones and dirt.