Rethink Quotes (2 quotes)
Sometimes scientists change their minds. New developments cause a rethink. If this bothers you, consider how much damage is being done to the world by people for whom new developments do not cause a rethink.
In Terry Pratchett, Ian Stewart and Jack Cohen, revised introductory section, 'The Story Starts Here', The Science of Discworld (Rev. ed. 2002), 14, PPS. The section is initialed by all three coauthors. Which of them wrote which lines, is not designated.
The Stone Age did not end because humans ran out of stones. It ended because it was time for a re-think about how we live.
As reported, without quotation marks, in Jo Twist, 'Eco-designs on Future Cities', on BBC News website (14 June 2005). McDonough did not originate the statement about the Stone Age; it has been used earlier and attributed to others. He added his own conclusion to it.