As for the No camp, its composition is every bit as striking as its arguments.

ECONOMIST: s for EMU | The Economist

But the investigation finds no changes in the composition of the sediments that would indicate a significant dip in temperatures in East Africa concurrent with the Toba eruption.

BBC: Toba super-volcano catastrophe idea 'dismissed'

This is either because they cause no change in the composition of the protein that the gene encodes (some apparently different genetic words actually have the same meaning to the protein-making apparatus), or because the change they make has no effect on the protein's function.

ECONOMIST: Genetics gets more complicated