The academic field that grew up around McLuhan, and in Bob's usage less a discipline than a symptom. His recurring formulation — that its six schools are an effect of the Android meme's 1990s replay of McLuhan's 1960s and 70s — treats the field as something produced by the period rather than as an independent reading of it. Dialogue 73 opens on the sentence, which is also where he dates the entrance of quadrophrenia's symptoms.
Across the dialogues
Given a causal origin rather than a description — the field is recast as a symptom produced by the Android meme's replay, and the point where quadrophrenia's symptoms enter the record
The field is given a cause outside itself — six schools are treated as the output of a decade-long replay rather than as six readings of McLuhan, which is what lets Bob diagnose rather than argue with them.
"six schools of Media Ecology are the result of the Android Meme replay of McLuhan in the 90s"
Connections
Bob's claim that the six schools are an effect of the Android meme's 1990s replay of McLuhan.
The six schools are where Bob dates the entrance of quadrophrenia's symptoms.