Bongard Problems sorted left have the keyword "meta" on the OEBP. This keyword is added to pages automatically.

Meta Bongard Problems are Bongard Problems that sort Bongard Problems. Sometimes abbreviated MBPs.

This is not about Bongard Problems that sort images of BPs. Those are labelled "semimeta" (left-BP566).

BPs that sort meta-BPs are labelled "metameta" (left-BP527).

BPs that sort meta-BPs are given in the keyword "metameta" (left-BP527).

Meta Bongard Problems vs. other Bongard Problems.

Bongard Problems sorted left have the keyword "meta" on the OEBP. This keyword is added to pages automatically.

Meta Bongard Problems are Bongard Problems that sort Bongard Problems. Sometimes abbreviated MBPs.

This is not about Bongard Problems that only sort images of BPs. Those are given the keyword "semimeta" (left-BP566).

BPs that sort meta-BPs (meta-meta-BPs) are given in left-BP527.