Firstly, it would be good to know how this question was posed in Hindi or the other regional languages presumably spoken by many of the 42,152 households surveyed. How exactly was “untouchability” translated and how would it be interpreted by the households surveyed? Would they immediately understand that this referred to discrimination based on caste? This seems plausible, but one would have greater faith in the question if we saw exactly how it was rendered in the various languages and how it was explained to the respondents.