[Tainnor]

Like any logical fallacy, the slippery slope is about the general validity of a logical inference - and not about the truth of its conclusion.

The slippery slope fallacy argues that "if X happens, then eventually Y will happen as well", where Y is a more extreme version of X. This is not a valid logical inference.

That doesn't mean that there are never cases where X actually leads to Y. Just as calling out "appeal to authority" doesn't mean that an expert isn't often right, or just as "correlation is not causation" doesn't imply that correlation is never causation.