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Most audit tools say "add social proof" with no evidence. PageLint traces every fix to a primary source: Ogilvy's Confessions, Schwartz's Breakthrough Advertising, Cialdini's Influence, and CXL Institute research. 55 checks across 8 lenses: clarity, relevance, value, trust, friction, and more. Every recommendation cites the book, study, or ruling it came from. Paste your URL. Get a prioritized report. First audit is free.