Slippery Slope is one of argumentative fallacies. Event A is presented as a trigger of event B, leading to event D. As a result, it appears that event A leads directly to event D without relevant evidence being presented. This is merely a fallacy, not a real argument. Example: “I don’t approve of registered partnership because then these couples will want to get married and adopt children, and then the same will be demanded by pedophiles and other deviants, who will thus get the opportunity to legally abuse children.

Source: Hate Free