That still doesn't make sense. They take it is a forgone conclusion that volume increases will _eventually_ result in cognitive benefits, but provide no evidenc

That still doesn't make sense. They take it is a forgone conclusion that volume increases will _eventually_ result in cognitive benefits, but provide no evidence or sources to support that notion. Of course, it seems to intuitively make sense that "bigger brain means smarter", but in a science article I would imagine they would be more rigorous about substantiating things.