Fallacious yet widespread and documented beliefs courtesy of Wikipedia.
It is often asserted that knife attacks are more dangerous than an attack with a firearm ("knives are more lethal than guns"). While self-defense instructors often make a point of emphasizing that a knife attack may very easily result in death, there is no statistical evidence that knife attacks are more likely to result in death than an attack with a handgun. A 1968 study claimed that gun attacks are five times more lethal than knife attacks. This figure has since become a controversial point of dispute in gun politics. A review of several studies published in 1983 concluded that lethality of wounds from handguns is between 1.3 and 3 times higher than lethality of wounds from knives.