What is the climax of the slippery slope?

Answer 1

Peculiar phrasing. Typically, a climax is a high point, or dramatic conclusion; the notion of "slippery slope" is that things keep sliding downhill until the exceptions in a plan take it over entirely, which is sort of the opposite of a climax.

For example, if someone wants all illegal aliens deported and someone else objects, saying we should allow people to stay if they've already been here for ten years, the one who wants them all expelled will say the exception is a "slippery slope" because there will be cases right on the borderline and the time will be relaxed to nine years, then seven, then five, then three and so on until the exception effectively swallows up the idea of deportation altogether.