 Which would the author think is most true?
"He literally couldn't look more like a paedophile," read one post – one of many to state a supposedly incontrovertible truth: that Savile's criminal tendencies could have been detected from the shape of his features, his eyes, his hair. Theories of physiognomy, however, would persist beyond the Renaissance. "And we can't shake that off because there's some truth to it. Physiognomy ultimately stems from what Alexander Todorov, professor of psychology at Princeton University, calls an 'overgeneralisation hypothesis'.
 People know their photos are being judged by others when they post them so they critically judge them themselves first
 We post pictures of ourselves online that we think are attractive to gain approval from specific people whose eyes we want to catch  Regular people can use their social media accounts to help locate bad people before crimes are committed, because people are better at this than computers  People know their photos are being judged by others when they post them so they critically judge them themselves first  The application of machine learning in the study of social media photos could make it easier to find criminals before they commit cimes