See BP553 for the version with @links to pages on the OEBP instead of images of Bongard Problems (@miniproblems).
See BP553 for the version with links to pages on the OEBP instead of images of Bongard Problems.
A rotation can switch an object's sorting vs. not so.
A reflection can switch an object's sorting vs. not so.
See BP553 for the fully meta version.
Aaron David Fairbanks