Comment by dxdm

I'm not arguing either side, but I'd like to note that human societies have been drawing various lines dealing with the legal and ethical issues surrounding the death of other people in various stages of age, competency and guilt, usually without descending into a free-for-all killing frenzy.

When things get bad, it was usually not the drawing of lines that did it, but the intention and underlying stance on the rights and indeed humanity of others. The line is not what makes the slope slippery, but a pervasive lack of empathy seems to do it. We also know that bad actors do not care about lines much.

So I think that slippery slope is not a powerful argument on its own.