Heuristics Explained
Heuristics are mental shortcuts for fast decisions: availability judges by what comes to mind, representativeness by similarity to stereotypes.
The exact change
35 percent recommendation-purchase figure attributed directly to Amazon; 25 percent crew-accident figure attributed to Helmreich with no real source; heart-attack diagnosis study cited as 2007 Psychological Science.
Recommendation-purchase figure now correctly attributed to a 2013 McKinsey estimate, noted as unverified; crew-accident claim softened to what Helmreich's real research actually supports, without the unverified percentage; diagnostic heuristic study now correctly cited as Green and Mehr, 1997.
Why this is better
Verified each named-study and named-statistic claim against the real research literature; found real researchers and real phenomena with unverified, misattributed, or mis-cited specifics layered on top.