In a 1995 interview with Microsoft co-founder Bill Gates, Pratchett expressed concern about the potential spread of misinformation online. He felt that there was a "kind of parity of esteem of information" on the internet, and gave the example of holocaust denial being presented on the same terms as peer-reviewed research, with no easy way to gauge reliability. Gates disagreed, saying that online authorities would index and check facts and sources in a much more sophisticated way than in print. The interview was rediscovered in 2019, and seen by Pratchett's biographer as prescient of fake news.