During the pandemic I have seen lots of evidence to support Bartlett's claim

"The greatest shortcoming of the human race is our inability to understand the exponential function".

Watching the counts of the anti-lockdown march go up, maybe I haven't given people enough credit.

4,000 - MyLondon

10,000 - Independent

Tens of thousands - Guardian

50,000+ - Laurence Fox

Hundreds of Thousands - James Melville

Many Hundreds of Thousands - Francis Hoar

500,000 - Jenny Rickson
(>100,000 Ex District Councillor Paul Dakers)

600,000-700,000 - Francis Hoar (again)

1,000,000 - Adam Stratford

If you're interested in understanding the maths behind crowd counting then you can find out a bit more here: https://en.wikipedia.org/wiki/Crowd_counting