Comment by thro1237

Given that people who memorize sanskrit hymns typically come from a single caste (with limited intermarriage between castes), the control should just include the members of that caste (but who don't memorize hymns) - to account for genetic effects. And as another commenter pointed out, this doesn't prove anything about Sanksrit. To prove something like that, the authors should have compared brain sizes with people who memorize other non-sanskrit texts.