Meta Bongard Problems of the form "solution depends on other information than [property] vs. solution only depends on [property]" vs. other meta Bongard Problems.
Left-sorted Bongard Problems have the keyword "dependence" on the OEBP.
"Dependence" Bongard Problems could be considered invariance Bongard Problems, where the relevant kind of transformation is swapping the example out for any other example that shares the relevant property.