These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Zen and the Art of Motorcycle Maintenance
Critical Research Failure: Pirsig reveals, over and over, his lack of research on philosophy, history (the Greeks and Romans didn't need the number zero, which is why they didn't invent it), and other such topics.