Non-matching congruence rule in rewriter is simply ignored. Used to cause error message.
Non-matching congruence rule in rewriter is simply ignored.
Used to cause error message.

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