See BP1001 for a version sorting pictures of Bongard Problems (miniproblems) instead of @links to pages on the OEBP. (This version is a little different. In BP1001, the kitchen sink of all other possible images is always included on the right "not so" side, rather than a context-dependent conceptual negation.)

Contrast keyword @viceversa.

"[Property A] vs. not so" Bongard Problems are often @allsorted, meaning they sort all relevant examples--but not always, because sometimes there exist ambiguous border cases, unclear whether they fit [Property A] or not.