back to quick_and_dirty, which is still practically important since the scheduler does not jump over subproofs;
back to quick_and_dirty, which is still practically important since the scheduler does not jump over subproofs;

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