refrain from quantifying outer fixes, to enable nesting of contexts like "context fixes x context assumes A x"; tuned;
refrain from quantifying outer fixes, to enable nesting of contexts like "context fixes x context assumes A x";
tuned;

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