1. Assumptions are dangerous. I assumed the gun was unloaded and did not double verify that status as rule one would imply. We can get away with a lot of assumptions that don't risk lives. We can assume the oil level is correct in our car. Of course, if that assumption proves false, it's time to fork out the cash for a new engine, but we'll live through the experience. When we make assumptions about the loaded condition of a gun, however, we better be right. At minimum, the consequences of a false assumption are embarrassment or property damage. In the worst case, it can lead to loss of life.