In particular, horizontal reflections work in all left examples.
An image of this Bongard Problem would fit on the left.
See BP552 for the version with links to pages on the OEBP instead of images of Bongard Problems (miniproblems).
Adjacent-numbered pages: BP866 BP867 BP868 BP869 BP870  *  BP872 BP873 BP874 BP875 BP876
hard, abstract, challenge, meta (see left/right), miniproblems, creativeexamples, presentationmatters, infodense, assumesfamiliarity, structure
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Aaron David Fairbanks