Bongard Problem is the beginning of a chain of meta Bongard Problems containing meta Bongard Problems on the left side that eventually ends in BP1 vs. not so.
Bongard Problem is the beginning of a chain of meta Bongard Problems containing meta Bongard Problems as positive examples that eventually ends in BP1 vs. not so.
Meta Bongard Problem is the beginning of a chain of meta Bongard Problems containing meta Bongard Problems as positive examples that eventually ends in BP1 vs. not so.