The fallacious sense of "slippery slope" is often used synonymously with continuum fallacy, in that it ignores the possibility of middle ground and assumes a discrete transition from category A to category B. In this sense it constitutes an informal fallacy.

Why is slippery slope considered a fallacy?

A slippery slope fallacy occurs when someone makes a claim about a series of events that would lead to one major event, usually a bad event. In this fallacy, a person makes a claim that one event leads to another event and so on until we come to some awful conclusion.

What is an example of a slippery slope fallacy?

It is an argument that suggests taking a minor action will lead to major and sometimes ludicrous consequences. Examples of Slippery Slope: If we allow the children to choose the movie this time, they are going to expect to be able to choose the school they go to or the doctors they visit.