It underlined that the 1950 order, challenged by the NGO, "does not suffer from any unconstitutionality" because the oppressive system of untouchability, which led to economic and social backwardness of some Hindu castes, was not prevalent in Christian or Islamic societies.
"In fact, one of the reasons for which people from scheduled castes have been converting to religions like Islam or Christianity is so that they can come out of the oppressive system of untouchability which is not prevalent at all in Christianity or Islam," the ministry said in the affidavit.
It said the Ranganath Mishra Commission, which had recommended the inclusion of Dalit Christians and Dalit Muslims in the SC list in 2007, took a myopic view of the issue and was "flawed". It said the report was prepared without conducting any field studies.