ALT Groupthink is the danger. Groupthink will lead people to mistrust both their senses and their intuitions. In a now famous experiment, subjects were told that their vision was being tested, and asked to say which line, in an array of three, was closest in length to a target line.21 The answer was obvious. However, stooges were set up to give the same, obviously erroneous, answer-after which the naïve test subject, in a third of trials, fell in with the majority, despite knowing it to be false (though, chillingly, some participants even started to believe the majority were right). This is one reason why it is of the utmost importance that there be dissenting voices, since the presence of even one dissenting voice reduced conformity by 80%.22 By Iain McGilchrist from his book, 'The Matter with Things: Our Brains, Our Delusions and the Unmaking of the World' 21 Asch 1951. 22 Asch 1956.