Well the debate is actually about whether racism is why we see racial inequality/strife. So the definition has been done for us.

Race - colloquial/folk race, based off of the US census where the research is done. And since self-id matches best fit genetic clusters at 99% it's sufficient
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1196372/

Intelligence - what helps you do well in the modern economy, which IQ measures rather well

People will say Piffer didnt internally vet his results (he did), or that they account for a small proportion of the variance (they do but this is the first swing of the axe, it's unlike nature provided groups with different genes all producing the same cognitive capacity on average) After all, race is arbitrary so why would nature care about making them equal even if it had the 'foresight' to do so?