The Disputed Case of Killing on Suspicion
The Romance has Cao Cao lodging with Lü Boshe while in flight, hearing knives sharpened in the back court and talk of "bind and kill it" (in fact preparing to slaughter a pig to feast him), suspecting he was to be harmed, and drawing his sword to kill Lü Boshe’s whole family; finding outside that it was a misunderstanding, he compounds it by killing the returning Lü Boshe too, uttering the famous line "I would rather betray the world than let the world betray me." Pei Songzhi’s notes to the histories cite three different sources — some call it a mistaken killing, some say Lü Boshe’s sons and nephews meant to rob and kill Cao Cao and he killed in self-defense — and which version is closer to the truth is a matter of scholarly debate to this day.