[jumelles]

The slippery slope argument is a fallacy.

[ch4s3]

It's only a logical fallacy in the form if p then q; if q then r if then ... so on until the end point you're arguing towards. To say that history informs us that a particular hill easily becomes slippery is not a logical fallacy.

[kelseyfrog]

It's a fallacy whenever someone argues from it. Like the GP, they are literally arguing from a SSF and no one believes that's what it is. Beyond the pale.

[throwaway5947]

You also need to consider the slope and slipperiness of the status quo.