Few people are really dumb, but when we're designing, writing and teaching, it's important to keep track of what logical level of abstraction we are speaking at. My reading was that Lanier in this piece seemed to take a joke reference and a codeword (zombie/zagnet) and treat them both as black boxes, where there was no logical coherence in what the relationship or effect of one was on the other, and it just produced a wandering narrative.