# Index of Bongard Problems

this is absolutely brilliant. https://en.wikipedia.org/wiki/Bongard_problem

*The idea of a Bongard problem is to present two sets of relatively
simple diagrams, say A and B. All the diagrams from set A have a common
factor or attribute, which is lacking in all the diagrams of set B. The
problem is to find, or to formulate, convincingly, the common factor.
The problems were popularised by their occurrence in the 1979 book
Gödel, Escher, Bach by Douglas Hofstadter, himself a composer of
Bongard problems*