See BP836 for the version with pictures of Bongard Problems instead of links to pages on the OEBP.
Bongard Problem with solution relating to concept: symmetry (invariance under transformation) vs. Bongard Problem unrelated to this concept.
See BP836 for the semimeta analogue.
Bongard Problem with solution relating to concept: symmetry vs. Bongard Problem unrelated to this concept.
Harry E. Foundalis