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Edward Hamilton's avatar

There are really two different ways that an argument might make an appeal to a "slippery slope". The first is an actual argument that some slope really is slippery, and that failing to draw a line at the current issue will make it harder to do so in the future, since it concedes a broad principle that will be incorporated in a larger epistemic model that can be deployed in more extensive ways. This is what Scott Alexander used to call "building a superweapon", where failing to defend several weak hills against a moderate and reasonable line of attack makes it more difficult to defend a strong hill against unreasonable attack in the future, when it really matters.

The second is just an appeal to consistency. When someone makes an argument based on an appeal to a principle that, if followed through consistently, would result in all kinds of obviously wrong conclusions, then we have a good basis to doubt that principle is valid. This can look like appealing to a slippery slope, but really what you are saying is more like, "Thank goodness this slope isn't actually as slippery as it should be, since to my immense relief you are a hypocrite. But you are appealing to a principle that, if a consistent person did believe it, would be deeply alarming in consequence."

Calling both of these things "the slippery slope fallacy" is the cause of all manner of confusion.

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Arne's avatar

My comment was a little flippant, but on point. Can't Maxwell see that maybe people would object to having no say at all on whether or not they have to take "a simple spit test"? That they might want to take part in the democratic process and have the legislature legislate, rather than submit to the governor?

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