Bongard Problem with solution relating to concept: 2 inputs 1 output vs. Bongard Problem unrelated to this concept.
Leo Crabbe
Metaworld Bongard Problems for sub-worlds of small equilateral triangles, circles, and squares all the same size: some filled in black, some outlines (BP905) vs. other metaworld Bongard Problems.
Aaron David Fairbanks