Is There a Correlation Between Breastfeeding and Lower IQ?

There's a correlation between breastfeeding and IQ, you absolutely see that correlation. The issue is that I don't think that is a causal relationship, and I think the best data doesn't show that. Some studies can do a much better job adjusting for differences across moms up to comparing kids who are born to same mom or siblings. And so we really want to sort of dive into the, like, is there a way to get a causality?