The contr_tac, which replaces a fast_tac, is needed only because eq_assume_tac does not recognize eta-equality.  But making it do so is costly
The contr_tac, which replaces a fast_tac, is needed only because eq_assume_tac
does not recognize eta-equality.  But making it do so is costly

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