avoid loop in 'all_class_pairs' (caused by e.g. loading the 'Ceta' theory and calling Sledgehammer with the two facts 'fun_of_map.cases' and 'Lattices.bounded_lattice_top_class.sup_top_left' with a polymorphic type encoding)
avoid loop in 'all_class_pairs' (caused by e.g. loading the 'Ceta' theory and calling Sledgehammer with the two facts 'fun_of_map.cases' and 'Lattices.bounded_lattice_top_class.sup_top_left' with a polymorphic type encoding)

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle