Derrida then proceeds to question the validity of their attacks against a few words he made in an off-the-cuff response during a conference that took place thirty years prior to their publication. He suggests there are plenty of scientists who have pointed out the difficulty of attacking his response. He also writes that there is no "relativism" or a critique of Reason and the Enlightenment in his works. He then writes of his hope that in the future this work is pursued more seriously and with dignity at the level of the issues involved.