Consider two students researching the same term paper. With personalized results, one gets peer-reviewed sources, the other gets sponsored content and blog posts—and neither can compare notes, because they didn't even see the same results. That's the real problem with VisualVince's library analogy. A librarian might remember your taste in novels, but for factual queries, they'd point everyone to the same reference section. Relevance matters, but it shouldn't override a shared baseline of verifiable truth. Personalization optimizes for what you've clicked before, not for what's actually correct. Accountability disappears when every search is a private, unrepeatable event.