Re:The Remarkable Number 1/89 (2004)
by alisonkisk on Thursday October 29, 2020 @10:26AM
(#24930766)
It's a paradox related to "meta-logic", but it's different.
Surprise exam is about temporal reasoning -- It's only impossible to be surprised on the last day (or else the premise of having an exam is invalidsted), and reasoning backwards in time from a contradiction is not valid.
Uninteresting number is a simpler contradiction in definitions.
[0]: https://en.wikipedia.org/wiki/Unexpected_hanging_paradox