but there are some long words in there.

It’s kinda funny you call vegans insufferable then write so condescendingly. I’m not sure if you actually bothered to read the article you linked, or if it was just the first thing that kinda validated your feelings when you searched Google.

Let’s take a second to look at some of the ingenious methodology you’ve linked us to:

Instead, the only research that comes close [to directly comparing cognitive function of different diets] involved the reverse. It was conducted on 555 Kenyan schoolchildren, who were fed one of three different types of soup – one with meat, one with milk, and one with oil – or no soup at all, as a snack over seven school terms. They were tested before and after, to see how their intelligence compared. Because of their economic circumstances, the majority of the children were de facto vegetarians at the start of the study.

So, the test is to feed one group soup with animal flesh, one group soup with dairy and the other soup with oil or no soup at all!

There was no effort to use foods with similar nutritional profiles to make a valid comparison, so it’s already not a study of plant vs. animal based foods, it’s a study of how different macronutrient profiles (or no nutrients!) affect intelligence.

This is why it’s hard to take carnist seriously when they try and debate vegans. Both science and ethical consistency go against them every time.