While in any rational world the slippery slope does NOT make for a good policy argument, it is however, a good emotional argument. That is really too bad. It is an argument that is based on fear (What if this happens, and that leads to the other, and then more? It will be AWFUL.) Well, sure, if you focus on the irrational end point, who wouldn’t be scared, but the argument is flawed. It is based on little or no evidence, and a reliance that events will occur based on this lack of evidence.