What data could I possibly have here? Even theoretically? What do you want me to give you?

>It's not clear that there is a zero-sum game here

Not necessarily exactly zero-sum, but it's very clear to me - adding a new priority means less focus on the older priorities.

Here is a very clear example of all three being sacrificed for inclusiveness: https://twitter.com/justintrudeau/status/1445200620340842496

Learning and language researchers have metrics they use to quantify reading comprehension. And in the inverse, reading comprehension skills and performance are tested in law school entrance exams (just as a personal example).