Accident (fallacy)

An accident fallacy happens when someone makes a mistake by assuming something that is generally true to be true in a particular situation when it is not. For example, if someone says that smoking is always bad for you, but a doctor smokes, they might say that the doctor is a liar. This is wrong because smoking is usually unhealthy, but it does not mean that it is always bad for everyone. In other words, just because something is generally true, it doesn't mean it is true in every situation. The accident fallacy is when someone makes this mistake and assumes that something that is usually true is always true.