Slippery slope is not a "fallacy" by default. It can be occasionally but its a perfectly reasonably argument in plenty of cases.
Sure, it's not a fallacy, but it does erode nuanced conversations and so it shouldn't be used without caution.
It is a fallacy by default. The existence and slipperiness of the slope must be justified to make it not a fallacy.
Sure, it's not a fallacy, but it does erode nuanced conversations and so it shouldn't be used without caution.