mg_domain: exception DOMAIN; proper witness_sorts; removed nonempty_sort;
mg_domain: exception DOMAIN;
proper witness_sorts;
removed nonempty_sort;

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