Metcalfe, inventor of ethernet, predicted in 1995 that the internet would collapse the next year, because the underlying tech couldn't possibly scale. He ended up having to literally eat his own words. See: https://en.wikipedia.org/wiki/Robert_Metcalfe#:~:text=24%5D%...
I'm curious why the audience would not accept him eating the paper pulp in large cake form? Perhaps because he couldn't reasonably eat the whole cake in front of them (and thus his words)?